Which of the Following Is/are Classified as an Acid-Base Reaction $\to$

Which of the following is/are classified as an acid-base reaction?
1.AgNO₃(aq) + HCl(aq) $\to$ AgCl(s) + HNO₃(aq)
2.2Mg(s) + O₂(g) $\to$ 2MgO(s)
3.Zn(s) + 2Ag⁺(aq) $\to$ 2Ag(s) + Zn²⁺(aq)

A) 1 only
B) 2 only
C) 3 only
D) 1,2,and 3
E) none