If $\tan \theta + \tan 2\theta + \tan 3\theta = \tan \theta \tan 2\theta \tan 3\theta $, then the general value of $\theta $ is

  • A

    $n\pi $

  • B

    $\frac{{n\pi }}{6}$

  • C

    $n\pi - \frac{\pi }{4} \pm \alpha $

  • D

    $\frac{{n\pi }}{2}$

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