The value of $x$,where $x>0$ and $\tan \left(\sec ^{-1}\left(\frac{1}{x}\right)\right)=\sin \left(\tan ^{-1} 2\right)$ is

  • A
    $\sqrt{5}$
  • B
    $\frac{\sqrt{5}}{3}$
  • C
    $1$
  • D
    $2/3$

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