The two aqueous solutions, $\mathrm{A}\left({\mathrm{AgNO}}_3\right)$ and $\mathrm{B}\left(\mathrm{LiCl}\right)$, were electrolysed using Pt electrodes. The pH of the resulting solutions will 

$\begin{array}{l} \\ {\mathrm{AgNO}}_3+{\mathrm{H}}_2\mathrm{O}\to \mathrm{Ag}+{\mathrm{H}}^{+}+{\mathrm{NO}}_3^{-}+\frac{1}{2}{\mathrm{O}}_2\\ {\text{In AgNO}}_3\text{ solution, }\left[{\mathrm{H}}^{+}\right]\text{ ion increases so pH decreases. }\\ {\text{LiCl + H}}_2\mathrm{O}\to {\mathrm{Li}}^{+}+{\mathrm{OH}}^{-}+\frac{1}{2}{\mathrm{Cl}}_2+\frac{1}{2}{\mathrm{H}}_2\\ \text{In LiCl solution, }\left[{\mathrm{OH}}^{-}\right]\text{ ion increases so pH increases.}\end{array}$