The correct order of decreasing basic strengths of $x$ (piperidine),$y$ (caprolactam derivative),and $z$ ($3$,$4$,$5$,$6$-tetrahydropyridine) is:

In the given reaction sequence:
$CH_3-CH_2-OH$ $\xrightarrow[(ii) H^{\oplus}]{(i) KMnO_4/OH^{\ominus}/\Delta} (A)$ $\xrightarrow[(ii) NH_3/\Delta]{(i) SOCl_2} (B)$ $\xrightarrow{Br_2/KOH} (C)$
$(C)$ will be:

The reaction of excess ethyl chloride with ammonia yields .................. .

$A$ hydrocarbon $A$ $(C_{4}H_{8})$ on reaction with $HCl$ gives a compound $B$ $(C_{4}H_{9}Cl)$ which on reaction with $1 \ mol$ of $NH_{3}$ gives compound $C$ $(C_{4}H_{11}N)$. On reacting with $NaNO_{2}$ and $HCl$ followed by treatment with water,compound $C$ yields an optically active compound $D$. The compound $D$ is

Consider the following reactions and identify the correct reaction.

Nitration of aniline in a strong acidic medium also gives $m$-nitroaniline because