Which of the following compounds gives an even number of Hoffmann's exhaustive methylation and elimination cycles?

Alkylamine dissolves in hydrochloric acid to form alkylammonium chloride. The nitrogen in the latter salt is:

The reaction of methylamine with acetyl chloride is similar to the reaction of aniline with . . . . . . .

In the reaction $CH_3NH_2 + X + KOH \rightarrow CH_3NC + 3KCl + 3H_2O$,what is $X$?

The reaction of amides with $Br_2$ and $OH^-$ (Hofmann bromamide degradation) involves an intramolecular migration of the alkyl group from the carbonyl carbon to the nitrogen atom with retention of configuration at the migrating center. Predict the products for the following reaction:
(Image shows two substituted cyclohexanecarboxamides reacting with $Br_2/OH^-$)

Identify product $B$ in the following reaction: $Aniline$ $\xrightarrow{NaNO_2 + HCl, 273 \ K} A$ $\xrightarrow{H_2O, \Delta} B + N_2 \uparrow$