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

Given below are two statements,one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: $3$-chloro-$2$-methylpentan-$3$-one can be subjected to Wolff-Kishner reduction to give $3$-chloro-$2$-methylpentane.
Reason $R$: Wolff-Kishner reduction is used to convert $C=O$ into $CH_2$.

The correct statement regarding a carbonyl compound with a hydrogen atom on its $\alpha-$carbon is:

Aldol condensation will not take place in

Acetophenone $(PhCOCH_3)$ reacts with perbenzoic acid to produce a compound $X$. Reaction of $X$ with excess $CH_3MgBr$ followed by treatment with aqueous acid predominantly produces

The major product of the following reaction is