Which of the following represents the correct order of acidic strength?

  • A
    $Cl_2O_7 > SO_2 > P_4O_{10}$
  • B
    $CO_2 > N_2O_5 > SO_3$
  • C
    $Na_2O > MgO > Al_2O_3$
  • D
    $K_2O > CaO > MgO$

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