Complete the following equation - ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}+{\mathrm{CH}}_3\mathrm{COCl}\to \mathrm{\_\_\_\_\_}+\mathrm{\_\_\_\_\_}$

Complete the following reactions assigning structures of A, B and C

${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH} \stackrel{{\mathrm{PCl}}_5}{\to } \mathrm{A} \stackrel{\mathrm{KCN}}{\to }\mathrm{B} \underset{{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{H}}^{+}}{\to }}\mathrm{C}$