What is obtained by the reaction of salicylic acid with acetic anhydride?

The alkaline hydrolysis of ester is known as

In the following sequence of reaction,$CH_3Br$ $\xrightarrow{KCN} (A)$ $\xrightarrow{H_3O^{+}} (B)$ $\xrightarrow{LiAlH_4, \text{ ether}} (C)$. The end product $(C)$ is

When carboxylic acid is treated with chlorine in the presence of red phosphorus,an alpha-chloro acid is formed. This reaction is known as:

Statement-$I$: Most carboxylic acids exist as dimers in vapour phase or in aprotic solvents due to intermolecular hydrogen bonding.
Statement-$II$: Higher carboxylic acids are practically insoluble in water due to the increased hydrophobic interaction of the hydrocarbon part.

When compound $A$ reacts with methyl alcohol in the presence of a few drops of $H_2SO_4$,it forms oil of wintergreen. What is compound $A$?