यदि $f(x) = \sqrt{1 + \cos^2(x^2)}$ है,तो $f^{\prime}\left(\frac{\sqrt{\pi}}{2}\right)$ का मान है

  • A
    $\frac{\sqrt{\pi}}{6}$
  • B
    $-\sqrt{\frac{\pi}{6}}$
  • C
    $\frac{\pi}{\sqrt{6}}$
  • D
    $\sqrt{\frac{\pi}{6}}$

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