Among Al2O3, SiO2, P2O3 and SO2 the correct order of acid strength is

Question

Among Al₂O₃, SiO₂, P₂O₃ and SO₂ the correct order of acid strength is

SO₂ < P₂O₃ < SiO₂ < Al₂O₃

Al₂O₃ < SiO₂ < _P2O₃ < SO₂

Al₂O₃ < SiO₂ < SO₂ < P₂O₃

SiO₂ < SO₂ < Al₂O₃ < P₂O₃

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