$A$ $\xrightarrow{H_2NOH} B$ $\xrightarrow{\text{reduction}} C$ $\xrightarrow{NOCl} CH_3CH_2Cl$. What are $A$ and $C$ in the given reaction sequence?

An organic compound $[A]$ $(C_4H_{11}N)$ shows optical activity and gives $N_2$ gas on treatment with $HNO_2$. The compound $[A]$ reacts with $PhSO_2Cl$ producing a compound which is soluble in $KOH$. The structure of $A$ is:

The reagent $P$ used for the reaction is

The correct order of basic strength for the given compounds is:

Isomeric amines with molecular formula $C_8H_{11}N$ give the following tests:
Isomer $(P) \Rightarrow$ Can be prepared by Gabriel phthalimide synthesis.
Isomer $(Q) \Rightarrow$ Reacts with Hinsberg's reagent to give a solid insoluble in $NaOH$.
Isomer $(R) \Rightarrow$ Reacts with $HONO$ followed by $\beta$-naphthol in $NaOH$ to give a red dye.
Isomers $(P), (Q)$ and $(R)$ respectively are:

What are $X$ and $Y$ in the following reaction?