Which one of the following arrangement is incorrect order?

• A

  O < S < F < Cl : Electron gain enthalpy

• B

  Al < Mg < P < S : Order of ${\text{IE}}_{\text{1}}$

• C

  ${\text{O}}^{-\text{2}}<{\text{F}}^{-}<{\text{Na}}^{+}<{\text{Mg}}^{+2}$ : Order of  ${\text{Z}}_{\text{effective}}$

• D

  ${\text{Mg}}^{\text{+2}}<{\text{Na}}^{+}<{\text{F}}^{-}<{\text{O}}^{-2}$ : Order of size