यदि $y = \sqrt{x + \sqrt{x^2 + 1}}$, तो $\frac{dy}{dx}$ का मान है

  • A
    $\frac{\sqrt{x^2 + 1} + x}{2y\sqrt{x^2 + 1}}$
  • B
    $\frac{\sqrt{x^2 + 1} + x}{y\sqrt{x^2 + 1}}$
  • C
    $\frac{\sqrt{x^2 + 1} + x}{4y\sqrt{x^2 + 1}}$
  • D
    $\frac{\sqrt{x^2 + 1} + x}{y}$

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