Write note on the reduction of carboxylic acid and its derivatives.

In the following reaction sequence: 

Compound $\mathrm{I}$ is

The major product of the following reaction is

$\underset{ \mathrm{ii}. {\mathrm{H}}_2\mathrm{O}}{\overset{ \mathrm{i}.\mathrm{LiAlH}{ }_4}{\to }}$

In the given reactions $\mathrm{M}$ is the number of major products obtained in ${\mathrm{I}}^{\mathrm{st}}$ reaction and $\mathrm{N}$ number of major products obtained in ${\mathrm{II}}^{\mathrm{nd}}$ reaction. Report your answer as $\mathrm{MN}$. .

(i) 

(ii) 

ldentify the alkene which will not provide the following alcohol upon oxymercuration demercuration.

Which reagent is suitable for this conversion?