If $\tan \theta + \tan 2\theta + \sqrt{3} \tan \theta \tan 2\theta = \sqrt{3}$,then the general values of $\theta$ are

  • A
    $(3n+1) \frac{\pi}{3}, n \in Z$
  • B
    $(3n+1) \frac{\pi}{9}, n \in Z$
  • C
    $(3n+1) \frac{\pi}{6}, n \in Z$
  • D
    $(2n+1) \frac{\pi}{9}, n \in Z$

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