The number of positive integers $k$ such that the constant term in the binomial expansion of $\left(2 x^{3}+\frac{3}{x^{k}}\right)^{12}, x \neq 0$ is $2^{8} \cdot \ell$, where $\ell$ is an odd integer, is......

  • [JEE MAIN 2022]
  • A

    $20$

  • B

    $9$

  • C

    $2$

  • D

    $70$

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  • [IIT 2010]

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