If the mean deviation about median for the number $3,5,7,2\,k , 12,16,21,24$ arranged in the ascending order, is $6$ then the median is

  • [JEE MAIN 2022]
  • A

    $11.5$

  • B

    $10.5$

  • C

    $12$

  • D

    $11$

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