What is the product $C$ in the following reaction?
$CH_3Br$ $\xrightarrow{KCN} A$ $\xrightarrow{H_3O^+} B$ $\xrightarrow{LiAlH_4} C$

In the reaction sequence,$[X]$ is a ketone:
$[X] \xrightarrow{KMnO_4/OH^{-}/\Delta} HOOC-(CH_2)_3-CH(CH_3)-COOH$
$[X]$ will be:

In Column - $I$ the structure of the compound is given,in Column - $II$ the boiling point,and in Column - $III$ the functional group is given. Find the correct match for Column - $I$ from Column - $II$ and Column - $III$.

Column - $I$ (Formula)	Column - $II$ (Boiling Point)	Column - $III$ (Group)
$(A)$ $CH_3COOH$	$(i)$ $309 \ K$	$(m)$ Alkane
$(B)$ $CH_3CH_2CH_2OH$	$(ii)$ $322 \ K$	$(n)$ Ketone
$(C)$ $CH_3COCH_3$	$(iii)$ $329 \ K$	$(o)$ Aldehyde
$(D)$ $CH_3CH_2CHO$	$(iv)$ $391 \ K$	$(p)$ Carboxylic acid
$(E)$ $CH_3CH_2CH_2CH_2CH_3$	$(v)$ $370 \ K$	$(q)$ Alcohol

Maximum enol content is in

Which of the following tetracarboxylic acids forms a di-anhydride upon heating?

Benzocaine has been used as a component of appetite suppressants,burn and sunburn remedies. Benzocaine is: