The carbonyl that does not undergo aldol condensation is

In set of reactions, identify $\mathrm{D}$

${\mathrm{CH}}_3\mathrm{COOH}\stackrel{{\mathrm{SOCl}}_2}{⟶}\mathrm{A}\underset{\mathrm{Anhydorus} {\mathrm{AlCl}}_3}{\overset{\mathrm{Benzene} }{\to }}\mathrm{B}\stackrel{\mathrm{HCN}}{⟶}\mathrm{C}\stackrel{{\mathrm{H}}_2\mathrm{O}}{⟶}\mathrm{D}$