What product is obtained by the reduction of $(CH_3)_2C=NOH$ using $Na$ and $EtOH$?

Which of the following amines cannot be prepared by Gabriel phthalimide synthesis?

An organic compound $A$ upon reacting with $NH_3$ gives $B$. On heating $B$ gives $C$. $C$ in presence of $KOH$ reacts with $Br_2$ to give $CH_3CH_2NH_2$. $A$ is:

$C_2H_5Br$ $\xrightarrow{AgCN} X$ $\xrightarrow{\text{Reduction}} Y$. Here $Y$ is

Aromatic nitriles $(ArCN)$ are not prepared by which reaction?

Gabriel phthalamide synthesis is used for the preparation of :-