$\lim _{x \rightarrow 1}\left((1-x) \tan \left(\frac{\pi x}{2}\right)\right)=$

  • A
    $\frac{1}{\pi}$
  • B
    $\frac{3}{\pi}$
  • C
    $\frac{4}{\pi}$
  • D
    $\frac{2}{\pi}$

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