If x2−y2=3x^2 - y^2 = 3x2−y2=3, which of the following is an integer solution?
(2,1)(2, 1)(2,1)
(2,−1)(2, -1)(2,−1)
(1,2)(1, 2)(1,2)
(0,1)(0, 1)(0,1)