Total number of $6-$digit numbers in which only and all the five digits $1,3,5,7$ and $9$ appear, is 

  • [JEE MAIN 2020]
  • A

    $\frac{5}{2}(6 !)$

  • B

    $5^6$

  • C

    $\frac{1}{2}(6 !)$

  • D

    $6!$

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