The $CORRECT$ ionisation energy order is

  • A

    $Zn^+ > Ca^+ > Cr^+$

  • B

    $Co^{2+} > Mn^{2+} > Cr^{2+}$

  • C

    $Mn^{2+} > Ni^{2+} > Ca^{2+}$

  • D

    $Zn^+ > Cu^+ > Ni^+$

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