If in the expansion of ${(1 + x)^m}{(1 - x)^n}$, the coefficient of $x$ and ${x^2}$ are $3$ and $-6$ respectively, then m is

  • [IIT 1999]
  • A

    $6$

  • B

    $9$

  • C

    $12$

  • D

    $24$

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  • [JEE MAIN 2022]