Identify the pair of drugs which act as tranquilizers

An alkyl halide $X\left(\mathrm{C}_4 \mathrm{H}_9 \mathrm{Br}\right)$ undergoes nucleophilic substitution by $\mathrm{S}_{\mathrm{N}} 2$ reaction. The product of $X$ on reaction with $\mathrm{Mg} /$ dry ether followed by $\mathrm{D}_2 \mathrm{O}$ is

Assertion (A) $\mathrm{p} K_a$ of phenol is 4.19 and that of benzoic acid is 10 .

Reason (R) Phenoxide ion is stabilised by non-equivalent resonance structures whereas benzoate ion by two equivalent resonance structures.

The correct option among the following is

In which of the following pairs reactant is correctly matched with reagent that would form benzaldehyde as product?