The function y = f ( x ) is the solution of the differential equation dy/dx + xy/x²−1 = x⁴+2x/√1− x² in (-1, 1) satisfying f(0) =0. Then ∫√3/2 −√3/2 f(x)d(x) is
A. π/3 − √3/2
B. π/3 − √3/4
C. π/6 − √3/4
D. π/6 − √3/2