Which of these is a solution to x2+2x+1=y2x^2 + 2x + 1 = y^2x2+2x+1=y2?
(0,1)(0, 1)(0,1)
(1,2)(1, 2)(1,2)
(2,3)(2, 3)(2,3)
(3,4)(3, 4)(3,4)