If $\tan \theta + \tan 2\theta + \sqrt 3 \tan \theta \tan 2\theta = \sqrt 3 ,$ then

  • A

    $\theta = (6n + 1)\pi /18,\,\forall n \in I$

  • B

    $\theta = (6n + 1)\pi /9,\,\forall n \in I$

  • C

    $\theta = (3n + 1)\pi /9,\,\forall n \in I$

  • D

    None of these

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