If $0\, \le \,x\, < \frac{\pi }{2},$ then the number of values of $x$ for which $sin\,x -sin\,2x + sin\,3x=0,$ is

  • [JEE MAIN 2019]
  • A

    $2$

  • B

    $1$

  • C

    $3$

  • D

    $4$

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