When the Following Reaction Is Balanced in Acidic Solution, What $\rightarrow$

When the following reaction is balanced in acidic solution, what is the coefficient of water? Zn(s) + NO₃^-(aq) $\rightarrow$ Zn²⁺(aq) + NH₄⁺(aq)

A) 2
B) 3
C) 1
D) 4
E) none of these