Which of the sequences below cannot be the side lengths of a right triangle?

A right triangle obeys the Pythagorean Theorem, a^2 + b^2 = c^2

Take the two smaller numbers. Square them add them.
Take the largest number. Square it.
Are those the same number?

A. (sqrt(3))^2 + (sqrt(4))^2 = (sqrt(5))^2, so 3 + 4 = 5, which is false