Consider the following equilibrium

$\mathrm{AgCl}\downarrow +2{\mathrm{NH}}_3\rightleftharpoons {\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}+{\mathrm{Cl}}^{-}$

White precipitate of AgCI appears on adding which of the following ?

White precipitate of AgCl appears on adding aqueous ${\mathrm{HNO}}_3$, White ppt of AgCl will appear by adding aq. NaCl as ${\mathrm{Cl}}^{-}\text{ion }$ from NaCl added will shift equilibrium in backward direction resulting in formation of AgCl ppt.