{
  "title": "Pythagoras Theorem - Grade 10 CBSE",
  "total_questions": 100,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "In right triangle, square of hypotenuse equals:", "options": {"A": "Sum of squares of other two sides", "B": "Difference of squares of other two sides", "C": "Product of other two sides", "D": "Sum of other two sides"}, "correct_answer": "A"},
    {"id": 2, "difficulty": "easy", "question": "If legs are 3 and 4, hypotenuse is:", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 3, "difficulty": "easy", "question": "In right ΔABC, right-angled at B, if AB=6, BC=8, then AC=", "options": {"A": "10", "B": "12", "C": "14", "D": "16"}, "correct_answer": "A"},
    {"id": 4, "difficulty": "easy", "question": "Pythagoras theorem applies to:", "options": {"A": "All triangles", "B": "Right triangles only", "C": "Acute triangles", "D": "Obtuse triangles"}, "correct_answer": "B"},
    {"id": 5, "difficulty": "easy", "question": "If hypotenuse=10, one leg=6, other leg=", "options": {"A": "8", "B": "9", "C": "7", "D": "√136"}, "correct_answer": "A"},
    {"id": 6, "difficulty": "easy", "question": "In right triangle, side opposite right angle is:", "options": {"A": "Hypotenuse", "B": "Base", "C": "Perpendicular", "D": "Altitude"}, "correct_answer": "A"},
    {"id": 7, "difficulty": "easy", "question": "Triplet 5,12,13 satisfies:", "options": {"A": "5²+12²=13²", "B": "5+12=13", "C": "5×12=60", "D": "13-12=5"}, "correct_answer": "A"},
    {"id": 8, "difficulty": "easy", "question": "If legs are 5 and 12, hypotenuse=", "options": {"A": "13", "B": "15", "C": "17", "D": "19"}, "correct_answer": "A"},
    {"id": 9, "difficulty": "easy", "question": "In ΔPQR, right-angled at Q, if PQ=9, QR=12, then PR=", "options": {"A": "15", "B": "18", "C": "21", "D": "24"}, "correct_answer": "A"},
    {"id": 10, "difficulty": "easy", "question": "Pythagoras theorem: a²+b²=", "options": {"A": "c²", "B": "c", "C": "2c", "D": "c/2"}, "correct_answer": "A"},
    {"id": 11, "difficulty": "easy", "question": "If hypotenuse=25, one leg=7, other leg=", "options": {"A": "24", "B": "23", "C": "22", "D": "21"}, "correct_answer": "A"},
    {"id": 12, "difficulty": "easy", "question": "Right triangle with sides 6,8,10 has right angle at:", "options": {"A": "Angle opposite 10", "B": "Angle opposite 8", "C": "Angle opposite 6", "D": "Not right triangle"}, "correct_answer": "A"},
    {"id": 13, "difficulty": "easy", "question": "If legs are 8 and 15, hypotenuse=", "options": {"A": "17", "B": "19", "C": "21", "D": "23"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "In right ΔXYZ, right-angled at Y, if XY=5, YZ=12, then XZ=", "options": {"A": "13", "B": "14", "C": "15", "D": "16"}, "correct_answer": "A"},
    {"id": 15, "difficulty": "easy", "question": "Pythagorean triplet:", "options": {"A": "3,4,5", "B": "2,3,4", "C": "4,5,6", "D": "5,6,7"}, "correct_answer": "A"},
    {"id": 16, "difficulty": "easy", "question": "If a=9, b=12, then c=", "options": {"A": "15", "B": "16", "C": "17", "D": "18"}, "correct_answer": "A"},
    {"id": 17, "difficulty": "easy", "question": "In right triangle, longest side is:", "options": {"A": "Hypotenuse", "B": "Base", "C": "Perpendicular", "D": "Median"}, "correct_answer": "A"},
    {"id": 18, "difficulty": "easy", "question": "Triplet 7,24,25 satisfies:", "options": {"A": "7²+24²=25²", "B": "7+24=25", "C": "7×24=168", "D": "25-24=7"}, "correct_answer": "A"},
    {"id": 19, "difficulty": "easy", "question": "If c=26, a=10, then b=", "options": {"A": "24", "B": "22", "C": "20", "D": "18"}, "correct_answer": "A"},
    {"id": 20, "difficulty": "easy", "question": "Right triangle sides satisfy:", "options": {"A": "a²+b²=c²", "B": "a+b=c", "C": "a×b=c", "D": "a²-b²=c²"}, "correct_answer": "A"},
    
    {"id": 21, "difficulty": "medium", "question": "In right ΔABC, right-angled at B, if AC=25, BC=24, find AB.", "options": {"A": "7", "B": "8", "C": "9", "D": "10"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "Ladder 10m long reaches window 8m high. Distance of foot from wall?", "options": {"A": "6m", "B": "7m", "C": "8m", "D": "9m"}, "correct_answer": "A"},
    {"id": 23, "difficulty": "medium", "question": "In right triangle, one leg is 7, hypotenuse 25. Find other leg.", "options": {"A": "24", "B": "23", "C": "22", "D": "21"}, "correct_answer": "A"},
    {"id": 24, "difficulty": "medium", "question": "Diagonal of rectangle 15cm by 8cm is:", "options": {"A": "17cm", "B": "18cm", "C": "19cm", "D": "20cm"}, "correct_answer": "A"},
    {"id": 25, "difficulty": "medium", "question": "In ΔPQR, right-angled at Q, PR=29, QR=21. Find PQ.", "options": {"A": "20", "B": "19", "C": "18", "D": "17"}, "correct_answer": "A"},
    {"id": 26, "difficulty": "medium", "question": "Height of equilateral triangle with side 10cm is:", "options": {"A": "5√3 cm", "B": "10√3 cm", "C": "5√2 cm", "D": "10√2 cm"}, "correct_answer": "A"},
    {"id": 27, "difficulty": "medium", "question": "If diagonal of square is 10√2 cm, its side is:", "options": {"A": "10cm", "B": "12cm", "C": "14cm", "D": "16cm"}, "correct_answer": "A"},
    {"id": 28, "difficulty": "medium", "question": "In right triangle, if one acute angle is 30°, ratio of sides is:", "options": {"A": "1:√3:2", "B": "1:1:√2", "C": "3:4:5", "D": "5:12:13"}, "correct_answer": "A"},
    {"id": 29, "difficulty": "medium", "question": "Man walks 15m east, 8m north. Distance from start?", "options": {"A": "17m", "B": "18m", "C": "19m", "D": "20m"}, "correct_answer": "A"},
    {"id": 30, "difficulty": "medium", "question": "In ΔABC, right-angled at B, if AB=5, AC=13, find BC.", "options": {"A": "12", "B": "11", "C": "10", "D": "9"}, "correct_answer": "A"},
    {"id": 31, "difficulty": "medium", "question": "If sides of right triangle are in ratio 3:4:5 and perimeter 36, find sides.", "options": {"A": "9,12,15", "B": "8,12,16", "C": "10,12,14", "D": "9,13,14"}, "correct_answer": "A"},
    {"id": 32, "difficulty": "medium", "question": "Diagonal of cube with edge 3cm is:", "options": {"A": "3√3 cm", "B": "3√2 cm", "C": "6cm", "D": "9cm"}, "correct_answer": "A"},
    {"id": 33, "difficulty": "medium", "question": "In right triangle, altitude to hypotenuse divides it into segments 4 and 9. Find altitude.", "options": {"A": "6", "B": "7", "C": "8", "D": "9"}, "correct_answer": "A"},
    {"id": 34, "difficulty": "medium", "question": "If legs are 10 and 24, area of triangle?", "options": {"A": "120", "B": "130", "C": "140", "D": "150"}, "correct_answer": "A"},
    {"id": 35, "difficulty": "medium", "question": "Distance between points (0,0) and (3,4) is:", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 36, "difficulty": "medium", "question": "In 30-60-90 triangle, if side opposite 30° is 5, hypotenuse is:", "options": {"A": "10", "B": "5√3", "C": "15", "D": "20"}, "correct_answer": "A"},
    {"id": 37, "difficulty": "medium", "question": "If diagonal of rectangle is 13cm and width 5cm, length is:", "options": {"A": "12cm", "B": "11cm", "C": "10cm", "D": "9cm"}, "correct_answer": "A"},
    {"id": 38, "difficulty": "medium", "question": "In right Δ, if one leg is half hypotenuse, other leg is:", "options": {"A": "√3/2 times hypotenuse", "B": "1/2 times hypotenuse", "C": "Equal to hypotenuse", "D": "Twice hypotenuse"}, "correct_answer": "A"},
    {"id": 39, "difficulty": "medium", "question": "Ladder 17m reaches window 15m high. Distance from wall?", "options": {"A": "8m", "B": "9m", "C": "10m", "D": "11m"}, "correct_answer": "A"},
    {"id": 40, "difficulty": "medium", "question": "In right triangle, median to hypotenuse is:", "options": {"A": "Half of hypotenuse", "B": "Equal to hypotenuse", "C": "Twice hypotenuse", "D": "√2 times hypotenuse"}, "correct_answer": "A"},
    {"id": 41, "difficulty": "medium", "question": "If sides are 1.5, 2, 2.5, area?", "options": {"A": "1.5", "B": "2", "C": "2.5", "D": "3"}, "correct_answer": "A"},
    {"id": 42, "difficulty": "medium", "question": "In isosceles right triangle, hypotenuse=10√2, each leg=", "options": {"A": "10", "B": "12", "C": "14", "D": "16"}, "correct_answer": "A"},
    {"id": 43, "difficulty": "medium", "question": "Distance between (1,2) and (4,6) is:", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 44, "difficulty": "medium", "question": "If altitude of equilateral triangle is 6√3, side is:", "options": {"A": "12", "B": "13", "C": "14", "D": "15"}, "correct_answer": "A"},
    {"id": 45, "difficulty": "medium", "question": "In right Δ, if hypotenuse=2√5 and one leg=2, other leg=", "options": {"A": "4", "B": "3", "C": "2√3", "D": "√6"}, "correct_answer": "A"},
    {"id": 46, "difficulty": "medium", "question": "Diagonal of square is 14√2, area is:", "options": {"A": "196", "B": "169", "C": "144", "D": "121"}, "correct_answer": "A"},
    {"id": 47, "difficulty": "medium", "question": "If legs are in ratio 3:4 and perimeter 36, find sides.", "options": {"A": "9,12,15", "B": "8,12,16", "C": "10,12,14", "D": "9,13,14"}, "correct_answer": "A"},
    {"id": 48, "difficulty": "medium", "question": "In right triangle, projection of legs on hypotenuse are 9 and 16. Find hypotenuse.", "options": {"A": "25", "B": "26", "C": "27", "D": "28"}, "correct_answer": "A"},
    {"id": 49, "difficulty": "medium", "question": "If area of right triangle is 30 and one leg=5, other leg=", "options": {"A": "12", "B": "13", "C": "14", "D": "15"}, "correct_answer": "A"},
    {"id": 50, "difficulty": "medium", "question": "In 45-45-90 triangle, if leg=7, hypotenuse=", "options": {"A": "7√2", "B": "7√3", "C": "14", "D": "21"}, "correct_answer": "A"},
    {"id": 51, "difficulty": "medium", "question": "Distance between (-3,4) and (2,-1) is:", "options": {"A": "5√2", "B": "5√3", "C": "10", "D": "12"}, "correct_answer": "A"},
    {"id": 52, "difficulty": "medium", "question": "If diagonal of rectangle is 10cm and length 8cm, width=", "options": {"A": "6cm", "B": "7cm", "C": "8cm", "D": "9cm"}, "correct_answer": "A"},
    {"id": 53, "difficulty": "medium", "question": "In right Δ, if altitude to hypotenuse is 6 and divides it into ratio 1:3, find legs.", "options": {"A": "2√15, 6√5", "B": "2√10, 6√2", "C": "3√5, 9", "D": "4√3, 8√2"}, "correct_answer": "A"},
    {"id": 54, "difficulty": "medium", "question": "If perimeter of right triangle is 30 and hypotenuse 13, find area.", "options": {"A": "30", "B": "32", "C": "34", "D": "36"}, "correct_answer": "A"},
    {"id": 55, "difficulty": "medium", "question": "In right ΔABC, right-angled at B, if AB=3, BC=4, find length of median from B to AC.", "options": {"A": "2.5", "B": "3", "C": "3.5", "D": "4"}, "correct_answer": "A"},
    {"id": 56, "difficulty": "medium", "question": "If sides of right triangle are x, x+1, x+2, find x.", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "A"},
    {"id": 57, "difficulty": "medium", "question": "Diagonal of rhombus with sides 10cm and one diagonal 12cm is other diagonal:", "options": {"A": "16cm", "B": "17cm", "C": "18cm", "D": "19cm"}, "correct_answer": "A"},
    {"id": 58, "difficulty": "medium", "question": "In right triangle, if circumradius is 6.5, hypotenuse=", "options": {"A": "13", "B": "12", "C": "11", "D": "10"}, "correct_answer": "A"},
    {"id": 59, "difficulty": "medium", "question": "If area of right triangle is 84 and hypotenuse 25, find perimeter.", "options": {"A": "56", "B": "57", "C": "58", "D": "59"}, "correct_answer": "A"},
    {"id": 60, "difficulty": "medium", "question": "In isosceles right triangle, area=32, each leg=", "options": {"A": "8", "B": "9", "C": "10", "D": "11"}, "correct_answer": "A"},
    {"id": 61, "difficulty": "medium", "question": "Distance between (a,0) and (0,b) is:", "options": {"A": "√(a²+b²)", "B": "a+b", "C": "|a-b|", "D": "ab"}, "correct_answer": "A"},
    {"id": 62, "difficulty": "medium", "question": "If median to hypotenuse is 5, hypotenuse=", "options": {"A": "10", "B": "9", "C": "8", "D": "7"}, "correct_answer": "A"},
    {"id": 63, "difficulty": "medium", "question": "In right triangle, if inradius=2 and hypotenuse=10, area=", "options": {"A": "24", "B": "25", "C": "26", "D": "27"}, "correct_answer": "A"},
    {"id": 64, "difficulty": "medium", "question": "If legs are 2√3 and 2, hypotenuse=", "options": {"A": "4", "B": "3√2", "C": "2√5", "D": "√10"}, "correct_answer": "A"},
    {"id": 65, "difficulty": "medium", "question": "Diagonal of square equals side times:", "options": {"A": "√2", "B": "√3", "C": "2", "D": "1/√2"}, "correct_answer": "A"},
    {"id": 66, "difficulty": "medium", "question": "In right triangle, if one acute angle is 45°, legs are:", "options": {"A": "Equal", "B": "In ratio 1:√3", "C": "In ratio 3:4", "D": "One half of other"}, "correct_answer": "A"},
    {"id": 67, "difficulty": "medium", "question": "If area of right triangle is 60 and one leg=8, other leg=", "options": {"A": "15", "B": "16", "C": "17", "D": "18"}, "correct_answer": "A"},
    {"id": 68, "difficulty": "medium", "question": "Distance from (3,4) to origin is:", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 69, "difficulty": "medium", "question": "In right Δ, if altitude to hypotenuse is geometric mean of segments, then triangle is:", "options": {"A": "Right-angled", "B": "Isosceles", "C": "Equilateral", "D": "Acute"}, "correct_answer": "A"},
    {"id": 70, "difficulty": "medium", "question": "If sides are 1.2, 1.6, 2.0, area?", "options": {"A": "0.96", "B": "1.0", "C": "1.2", "D": "1.4"}, "correct_answer": "A"},
    {"id": 71, "difficulty": "medium", "question": "In right triangle, circumcenter is at:", "options": {"A": "Midpoint of hypotenuse", "B": "Vertex of right angle", "C": "Inside triangle", "D": "Outside triangle"}, "correct_answer": "A"},
    {"id": 72, "difficulty": "medium", "question": "If diagonal of rectangle is 15 and length 12, perimeter=", "options": {"A": "42", "B": "44", "C": "46", "D": "48"}, "correct_answer": "A"},
    {"id": 73, "difficulty": "medium", "question": "In right triangle, if one leg is 60% of hypotenuse, other leg is:", "options": {"A": "0.8 times hypotenuse", "B": "0.6 times hypotenuse", "C": "Equal to hypotenuse", "D": "1.2 times hypotenuse"}, "correct_answer": "A"},
    {"id": 74, "difficulty": "medium", "question": "If midpoint of hypotenuse is (3,4) and one vertex is (0,0), other vertices could be:", "options": {"A": "(6,0) and (0,8)", "B": "(5,0) and (0,7)", "C": "(4,0) and (0,6)", "D": "(3,0) and (0,4)"}, "correct_answer": "A"},
    {"id": 75, "difficulty": "medium", "question": "In right triangle, if inradius=3 and area=24, perimeter=", "options": {"A": "24", "B": "25", "C": "26", "D": "27"}, "correct_answer": "A"},
    {"id": 76, "difficulty": "medium", "question": "If legs are in ratio 5:12 and area 120, hypotenuse=", "options": {"A": "26", "B": "27", "C": "28", "D": "29"}, "correct_answer": "A"},
    {"id": 77, "difficulty": "medium", "question": "Distance between parallel lines y=3x+4 and y=3x-2 is:", "options": {"A": "6/√10", "B": "5/√10", "C": "4/√10", "D": "3/√10"}, "correct_answer": "A"},
    {"id": 78, "difficulty": "medium", "question": "In right triangle, if median to hypotenuse is 6.5, area=30, find legs.", "options": {"A": "5,12", "B": "6,10", "C": "8,7.5", "D": "9,6.67"}, "correct_answer": "A"},
    {"id": 79, "difficulty": "medium", "question": "If diagonal of square is d, area=", "options": {"A": "d²/2", "B": "d²/4", "C": "d²/√2", "D": "d²"}, "correct_answer": "A"},
    {"id": 80, "difficulty": "medium", "question": "In right triangle, if sum of legs is 17 and hypotenuse 13, area=", "options": {"A": "30", "B": "32", "C": "34", "D": "36"}, "correct_answer": "A"},
    
    {"id": 81, "difficulty": "hard", "question": "In right triangle ABC, right-angled at B, altitude BD to AC. If AD=4cm, DC=9cm, find BD, AB and BC.", "options": {"A": "BD=6, AB=2√13, BC=3√13", "B": "BD=5, AB=2√10, BC=3√10", "C": "BD=6, AB=√40, BC=√90", "D": "BD=5, AB=√29, BC=√61"}, "correct_answer": "A"},
    {"id": 82, "difficulty": "hard", "question": "Ladder 15m long reaches window 12m high. If foot is pulled away making ladder slide down 3m, how far did foot move?", "options": {"A": "7m", "B": "8m", "C": "9m", "D": "10m"}, "correct_answer": "A"},
    {"id": 83, "difficulty": "hard", "question": "In right triangle, hypotenuse is 2√10. If one leg is 2 more than other, find legs and area.", "options": {"A": "Legs: 6,4; Area:12", "B": "Legs: 5,3; Area:7.5", "C": "Legs: 6,4; Area:10", "D": "Legs: 5,3; Area:6"}, "correct_answer": "A"},
    {"id": 84, "difficulty": "hard", "question": "Two poles 15m and 10m high. Rope tied to tops makes 45° with ground. Distance between poles?", "options": {"A": "5m", "B": "6m", "C": "7m", "D": "8m"}, "correct_answer": "A"},
    {"id": 85, "difficulty": "hard", "question": "In ΔABC, ∠B=90°, BD⟂AC. If AB=6cm, BC=8cm, find AD, DC and BD.", "options": {"A": "AD=3.6, DC=6.4, BD=4.8", "B": "AD=3.2, DC=6.8, BD=4.8", "C": "AD=3.6, DC=6.4, BD=4.0", "D": "AD=3.2, DC=6.8, BD=4.0"}, "correct_answer": "A"},
    {"id": 86, "difficulty": "hard", "question": "Man walks 14m west, 48m north. How far from start? If he walks back diagonally, distance saved?", "options": {"A": "50m, saved 12m", "B": "52m, saved 10m", "C": "50m, saved 10m", "D": "52m, saved 12m"}, "correct_answer": "A"},
    {"id": 87, "difficulty": "hard", "question": "In right triangle, altitude to hypotenuse divides it into segments ratio 1:4. If altitude=6, find sides.", "options": {"A": "3√5, 6√5, 15", "B": "2√5, 4√5, 10", "C": "3√2, 6√2, 9", "D": "2√3, 4√3, 6"}, "correct_answer": "A"},
    {"id": 88, "difficulty": "hard", "question": "If perimeter of right triangle is 30cm and inradius 2cm, find sides and area.", "options": {"A": "5,12,13; Area=30", "B": "6,8,10; Area=24", "C": "5,12,13; Area=24", "D": "6,8,10; Area=30"}, "correct_answer": "A"},
    {"id": 89, "difficulty": "hard", "question": "From point 20m away from tower, angle of elevation 45°. Find height. If moves 20m closer, new angle?", "options": {"A": "Height=20m, new angle=60°", "B": "Height=20√3, new angle=30°", "C": "Height=20m, new angle=30°", "D": "Height=20√3, new angle=60°"}, "correct_answer": "A"},
    {"id": 90, "difficulty": "hard", "question": "In right triangle, median to hypotenuse=10, one leg=16. Find other leg and area.", "options": {"A": "Other leg=12, Area=96", "B": "Other leg=10, Area=80", "C": "Other leg=14, Area=112", "D": "Other leg=8, Area=64"}, "correct_answer": "A"},
    {"id": 91, "difficulty": "hard", "question": "If sides of right triangle are (x-1), x, (x+1), find x and area.", "options": {"A": "x=4, Area=6", "B": "x=5, Area=10", "C": "x=4, Area=10", "D": "x=5, Area=12"}, "correct_answer": "A"},
    {"id": 92, "difficulty": "hard", "question": "Two circles radii 5cm and 12cm touch externally. Distance between centers?", "options": {"A": "17cm", "B": "18cm", "C": "19cm", "D": "20cm"}, "correct_answer": "A"},
    {"id": 93, "difficulty": "hard", "question": "In right triangle, if difference of legs=7cm and hypotenuse=13cm, find area.", "options": {"A": "30cm²", "B": "32cm²", "C": "34cm²", "D": "36cm²"}, "correct_answer": "A"},
    {"id": 94, "difficulty": "hard", "question": "If in right triangle, inradius=3cm, circumradius=7.5cm, find sides.", "options": {"A": "12,9,15", "B": "10,8,12", "C": "14,10,18", "D": "16,12,20"}, "correct_answer": "A"},
    {"id": 95, "difficulty": "hard", "question": "From top of tower 100m high, angles of depression of two cars 45° and 60°. Distance between cars?", "options": {"A": "100(√3-1)m", "B": "100(√3+1)m", "C": "100(2-√3)m", "D": "100(2+√3)m"}, "correct_answer": "A"},
    {"id": 96, "difficulty": "hard", "question": "If area of right triangle=150 and hypotenuse=25, find inradius.", "options": {"A": "5", "B": "6", "C": "7", "D": "8"}, "correct_answer": "A"},
    {"id": 97, "difficulty": "hard", "question": "In right triangle, altitude to hypotenuse divides it so one segment is 9/16 of other. If altitude=12, find sides.", "options": {"A": "15,20,25", "B": "12,16,20", "C": "18,24,30", "D": "21,28,35"}, "correct_answer": "A"},
    {"id": 98, "difficulty": "hard", "question": "If sum of legs of right triangle=17cm and area=60cm², find hypotenuse.", "options": {"A": "13cm", "B": "14cm", "C": "15cm", "D": "16cm"}, "correct_answer": "A"},
    {"id": 99, "difficulty": "hard", "question": "From point on ground, angles of elevation of top and bottom of flagstaff on tower are 60° and 45°. If tower=20m, find flagstaff height.", "options": {"A": "20(√3-1)m", "B": "20√3m", "C": "20(√3+1)m", "D": "20(2-√3)m"}, "correct_answer": "A"},
    {"id": 100, "difficulty": "hard", "question": "In right triangle, if median to hypotenuse=5 and one median to leg=4, find sides.", "options": {"A": "6,8,10", "B": "5,12,13", "C": "7,24,25", "D": "8,15,17"}, "correct_answer": "A"}
  ]
}