$\cos \left[ 2\cos^{-1}\frac{1}{5} + \sin^{-1}\frac{1}{5} \right] = $

  • A
    $\frac{2\sqrt{6}}{5}$
  • B
    $-\frac{2\sqrt{6}}{5}$
  • C
    $\frac{1}{5}$
  • D
    $-\frac{1}{5}$

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