If $f(x)=\operatorname{cosec}^{-1}\left[\frac{10}{6 \sin \left(2^x\right)-8 \cos \left(2^x\right)}\right]$,then $f^{\prime}(x)$ is equal to:

  • A
    $2^x \log 2$
  • B
    $-1$
  • C
    $\log 2$
  • D
    $2^x$

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