What is the major product obtained from the following reaction?

$A$ compound $X$ on treatment with $Br_2/NaOH$ provided $C_3H_9N$,which gives a positive carbylamine test. Compound $X$ is

Which of the following groups increases the basic strength of substituted aniline?

In the series of reactions: $C_6H_5NH_2$ $\xrightarrow{NaNO_2/HCl}_{0 - 5\ ^\circ C} X$ $\xrightarrow{HNO_2}_{H_2O} Y + N_2 + HCl$. $X$ and $Y$ are respectively:

$C_6H_5NH_2$ $\xrightarrow[0-5\,^{\circ}C]{HCl + NaNO_2} A$ $\xrightarrow{CuCN} B$ $\xrightarrow{H_2/Ni} C$ $\xrightarrow{HNO_2} D$
The structure of $D$ is

The major product in the following reaction is: