Answer: A. 15/8/17
Answer: (A) 15/8/17
For a Pythagorean triplet the square of the largest number equals the sum of the squares of the other two: \(8^2 + 15^2 = 64 + 225 = 289 = 17^2\).
The others fail: \(16^2 + 8^2 = 320 \ne 256\); \(3^2 + 5^2 = 34 \ne 289\); \(4^2 + 9^2 = 97 \ne 225\).