The number of solutions of the equation $4 \sin ^2 x-4$ $\cos ^3 \mathrm{x}+9-4 \cos \mathrm{x}=0 ; \mathrm{x} \in[-2 \pi, 2 \pi]$ is :

  • [JEE MAIN 2024]
  • A

    $1$

  • B

    $3$

  • C

    $2$

  • D

    $0$

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