Which of the following compounds is obtained when a quaternary ammonium hydroxide is strongly heated?

Consider the following:
Statement-$I$: In the nitration of aniline,a significant amount of $m$-nitroaniline is formed.
Statement-$II$: In the presence of a strongly acidic medium,aniline is protonated to form the anilinium ion,which is meta-directing.

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

$CH_3NH_2 + CHCl_3 + KOH \rightarrow$ Nitrogen containing compound $+ KCl + H_2O$. The nitrogen-containing compound is:

The preferred sites of protonation in the following compounds are:
$(i)$ $CH_3CONHCH_3$
(ii) $2$-aminopyridine

Benzene diazonium chloride on reaction with aniline in the presence of dilute hydrochloric acid gives: