The correct order of hydration enthalpies of alkali metal ions is
- A$Li^{+} > Na^{+} > K^{+} > Cs^{+} > Rb^{+}$
- B$Na^{+} > Li^{+} > K^{+} > Rb^{+} > Cs^{+}$
- C$Na^{+} > Li^{+} > K^{+} > Cs^{+} > Rb^{+}$
- D$Li^{+} > Na^{+} > K^{+} > Rb^{+} > Cs^{+}$
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