यदि $f(x) = \log_{x^2}(\log x)$ है,तो $x = e$ पर $f'(x)$ का मान क्या होगा?

  • A
    $\frac{1}{e^2}$
  • B
    $\frac{1}{e}$
  • C
    $e^2$
  • D
    $\frac{1}{2e}$

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