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

Question

I < Br < Cl < F (increasing electron gain enthalpy)

Li < Na < K < Rb (increasing metallic radius)

Al³⁺ < Mg²⁺ < Na⁺ < F^$-$ (increasing ionic size)

B < C < N < O (increasing first ionisation enthalpy)

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