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

  • A
    $\frac{4x}{1 - x^2} \cos \left( \frac{1 + x^2}{1 - x^2} \right)$
  • B
    $\frac{x}{(1 - x^2)^2} \cos \left( \frac{1 + x^2}{1 - x^2} \right)$
  • C
    $\frac{x}{1 - x^2} \cos \left( \frac{1 + x^2}{1 - x^2} \right)$
  • D
    $\frac{4x}{(1 - x^2)^2} \cos \left( \frac{1 + x^2}{1 - x^2} \right)$

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