The coefficient of $x ^7$ in $\left(1-x+2 x^3\right)^{10}$ is $........$.

  • [JEE MAIN 2023]
  • A

    $960$

  • B

    $950$

  • C

    $940$

  • D

    $960$

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  • [JEE MAIN 2021]

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  • [JEE MAIN 2023]

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