Four statements about the reactions of oxides with dilute hydrochloric acid and with aqueous sodium hydroxide are listed. 1 Aluminium oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide. 2 Calcium oxide reacts with both dilute hydrochloric acid and aqueous sodium hydroxide. 3 Copper(II) oxide reacts with dilute hydrochloric acid but not with aqueous sodium hydroxide. 4 Sulfur dioxide does not react with either dilute hydrochloric acid or aqueous sodium hydroxide. Which statements are correct?

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