The catalyst $SnCl_2/HCl$ is used in:

Which of the following reagents/reactions will convert $A$ to $B$?

Statement-$I$: Reduction of ester by $DIBAL-H$ followed by hydrolysis gives aldehyde.
Statement-$II$: Oxidation of benzyl alcohol with aqueous $KMnO_4$ leads to the formation of benzaldehyde.
Among the above statements,identify the correct statement.

The intermediate compound $X$ in the following chemical reaction is :

Identify the product in the following reaction: $Pent-3-enenitrile \xrightarrow[H_3O^+]{AlH(i-Bu)_2} \text{Product}$

What is the final product obtained when benzonitrile reacts with phenyl magnesium bromide in equimolar proportion?