Which set represents a Pythagorean triple???

A.) 1, 2, 3
B.) 9, 12,16
C.) 30, 40, 50
D.) 38, 44, 49

Wouldn't it be C.) I am not to sure on my answer could someone tell me if I am right???
Thank you!!!

C is correct

any multiple of 3-4-5 will be a Pythagorean triple