Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?

Self condensation of two moles of ethyl acetate in presence of sodium ethoxide yields

In a set of reactions propionic acid yielded a compound D.

The structure of D would be

A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of $$\alpha $$-hydrixy acid. The carbonyl compound is