Answer: A
5,12,13 is a common Pythagorean triple, the second on the list after 3,4,5
B and C aren't on the list, and they would be if they were Pythagorean Triples, which is a list of natural number length sides (a,b,c) which satisfy the Pythagorean Theorem, a²+b²=c², making them the sides of a right triangle.
Let's verify:
5²+12² = 25+144 = 169 = 13² √
4²+4² = 16+16 = 32 ≠ 8² √
2²+3² = 4+9 = 13 ≠ 4² √
