a, b and c are a Pythagorean triplet if, a2+b2=c2 (A) 82+152=172 (∴ 8, 15, 17 is a Pythagorean triplet) (B) 112+602≠632 (∴ 11, 60, 63 is not Pythagorean triplet) (C) 132+842=852 (∴ 13, 84, 85 is a Pythagorean triplet) (D) 72+242=252 (∴ 7, 24, 25 is a Pythagorean triplet)