What is the increasing order of hydration enthalpies of alkali metal ions?
- A$Cs^{+} < Rb^{+} < K^{+} < Na^{+} < Li^{+}$
- B$Cs^{+} < Rb^{+} < K^{+} < Li^{+} < Na^{+}$
- C$Li^{+} < Na^{+} < K^{+} < Rb^{+} < Cs^{+}$
- D$Cs^{+} < Rb^{+} < Na^{+} < K^{+} < Li^{+}$
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