If $\tan \theta = \frac{p}{q},$ then $\frac{p \sin \theta - q \cos \theta}{p \sin \theta + q \cos \theta} = $

  • A
    $\frac{p^2 + q^2}{p^2 - q^2}$
  • B
    $\frac{p^2 - q^2}{p^2 + q^2}$
  • C
    $\frac{p^2 + q^2}{p^2 - q^2}$
  • D
    None of these

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