Answer
See answer below.
Work Step by Step
a) $Zn(OH)_2(s)+2\ HCl(aq)\rightarrow ZnCl_2(aq)+2\ H_2O(l)$
Only valid option.
b) $ZnCO_3(s)+2\ HCl(aq)\rightarrow ZnCl_2(aq)+H_2O(l)+CO_2(g)$
Only valid option.
c) $Zn(s)+Cl_2(g)\rightarrow ZnCl_2(aq)$
Only valid option.