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Which two sets of reactants best represent the amphoteric character of Zn(OH)2?

Set 1: Zn(OH)2(s)  and OH-(aq)

Set 2: Zn(OH)2(s) and H2O(l)

Set 3: Zn(OH)2(s) and H+(aq)

Set 4: Zn(OH)2(s) and NH3(aq)

(a) 1 and 2       (b) 1 and 3     (c) 2 and 4     (d) 3 and 4