The number of $d-$ electrons in $F{e^{2 + }}$ (at no. of $Fe = 26$) is not equal to that of the

  • A

    $p - $ electrons in $Ne$ (at. no. $= 10$)

  • B

    $s -$  electrons in $Mg$ (at. no. $= 12$)

  • C

    $d - $ electrons in $Fe$

  • D

    $p -$  electrons in $C{l^ - }$ (at. no. of $Cl = 17$)

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