यदि $\cot 20^{\circ} = p$ है,तो $\frac{\tan 160^{\circ} - \tan 110^{\circ}}{1 + \tan 160^{\circ} \tan 110^{\circ}} =$

  • A
    $\frac{p^{2} - 1}{2p}$
  • B
    $\frac{p^{2} + 1}{2p}$
  • C
    $\frac{1 - p^{2}}{2p}$
  • D
    $\frac{2p}{1 + p^{2}}$

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