For the equation x2−7y2=1x^2 - 7y^2 = 1x2−7y2=1, which of the following is a valid integer solution?
(4,1)(4, 1)(4,1)
(8,3)(8, 3)(8,3)
(127,48)(127, 48)(127,48)
(16,6)(16, 6)(16,6)