$sin 3\theta = 4 sin\, \theta \,sin \,2\theta \,sin \,4\theta$ in $0\, \le \,\theta\, \le \, \pi$ has :

  • A

    $2$ real solutions

  • B

    $4$ real solutions

  • C

    $6$ real solutions

  • D

    $8$ real solutions.

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