If $\alpha { = ^m}{C_2}$, then $^\alpha {C_2}$is equal to

  • A

    $^{m + 1}{C_4}$

  • B

    $^{m - 1}{C_4}$

  • C

    $3\,.{\;^{m + 2}}{C_4}$

  • D

    $3\;.{\;^{m + 1}}{C_4}$

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