Which of the following is best described as an acid–base reaction? Cu(s) + H2S(g) → CuS(s) + H2(g) 2KClO3(aq) → 2KCl(s) + 3O2(g) 2H2(g) + O2(g) → 2H2O(l) P4(s) + 3OH–(aq) + 3H3O(l) → PH3(g) + 3H2PO2–(aq) HNO3(aq) + LiOH(aq) → LiNO3(aq) + H2O(aq)   Provide explanation on why the answer is correct.

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