If y = sin ¯¹(x. v√1 - x + √xV1 - x²), then dy/dx =
A. −2x/[√1+x²] + 1/[2√x−x²]
B. -1/[√1 + x²] - 1/[2√x - x2]
C. 1/[V1 + x²] - 1/[2√x - x²]
D. None of these