One of the bisector of the angle between the lines `a(x-1)^2 + 2h(x-1)(y-2) + b (y-2)^2` = 0 is `x + 2y - 5 = 0`. Then other bisector is
(A) `2x-y=0`
(B) `2x+y=0`
(C) `2x+y-4=0`
(D) `x-2y+3=0`