What coefficient of $AgN{O}_3$ is required to balance the following equation?

$Cu+AgN{O}_3\to Cu(N{O}_3{)}_2+Ag$

The correct option is B $2$
Balance $N$ and $O$ in the reaction by writing $2$ before $AgN{O}_3$.

$N,O,Cu$ is balanced but not $Ag.$

Balance $Ag$ by writing $2$ before $Ag$ on right side. Balanced chemical reaction is.

$Cu+2AgN{O}_3⟶Cu{\left(N{O}_3\right)}_2+2Ag.$