Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

Name the end product in the following series of reactions
${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}\mathrm{O}\mathrm{O}\mathrm{H}\stackrel{\mathrm{N}{\mathrm{H}}_3}{\to }\mathrm{P}\stackrel{\mathrm{\Delta }}{\to }\mathrm{Q}\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }\mathrm{R}\stackrel{\mathrm{L}\mathrm{i}\mathrm{A}\mathrm{l}{\mathrm{H}}_4}{\to }\mathrm{S}$