The coefficient of $x^{4}$ in the expansion of $\left(1+x+x^{2}+x^{3}\right)^{6}$ in powers of $x,$ is

  • [JEE MAIN 2020]
  • A

    $116$

  • B

    $118$

  • C

    $120$

  • D

    $124$

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