In which of the following options does the order of arrangement not agree with the variation of property indicated against it?

• A
  $Al^{3+} < Mg^{2+} < Na^{+} < F^{-}$ (increasing ionic size)
• B
  $B < C < O < N$ (increasing first ionisation enthalpy)
• C
  $I < Br < Cl < F$ (increasing electron gain enthalpy)
• D
  $Li < Na < K < Rb$ (increasing metallic radius)