Which set of side lengths is a Pythagorean triple?

A) 1, 3, 10
B) 4, 5, 9
C) 9, 40, 41
D) 16, 30, 44

Find the lateral surface area plzzz

Does anyone know how to do geometryme with this problem

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible