Which of the following orders is incorrect?
- A$NH_3 < PH_3 < AsH_3$ (Acidic character)
- B$Li < Be < B < C$ (First Ionization Energy)
- C$Al_2O_3 < MgO < Na_2O < K_2O$ (Basic character)
- D$Li^+ < Na^+ < K^+ < Cs^+$ (Ionic character)
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