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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