Which of the following is NOT a Pythagorean triple?
(3,4,5)(3, 4, 5)(3,4,5)
(5,12,13)(5, 12, 13)(5,12,13)
(7,24,25)(7, 24, 25)(7,24,25)
(6,7,8)(6, 7, 8)(6,7,8)