यदि $y = \sin^{-1} \left( \frac{\sqrt{1+x} + \sqrt{1-x}}{2} \right)$ है,तो $\frac{dy}{dx} = $

  • A
    $\frac{1}{\sqrt{1-x^2}}$
  • B
    $-\frac{1}{\sqrt{1-x^2}}$
  • C
    $-\frac{1}{2\sqrt{1-x^2}}$
  • D
    इनमें से कोई नहीं

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