The product of this Hoffmann bromamide reaction is:

Write the chemical reactions for the following conversions:
$1.$ Aniline to Picric acid
$2.$ Ethanal to Butan$-2-$ol

Predict the stereochemistry of the product when a $d$ and $l$-amine mixture reacts with an $l$-acid.

Given below are two statements:
Statement $I$: $o$-Phenylenediamine can be synthesized from $o$-xylene using simpler reagents in the order: $i)$ Acidic $KMnO_4$,$ii)$ Ammonia,$iii)$ Bromine and alkali.
Statement $II$: Aniline can be converted into benzene using reagents in the order: $(i)$ Bromine-$H_2O$,$(ii)$ $NaNO_2 / HCl$ $(0-5^{\circ} C)$,$(iii)$ aq. $H_3PO_2$.
In the light of the above statements,choose the correct answer from the options given below.

Primary and secondary amines are distinguished by
$(i)$ Hinsberg test
$(ii)$ Carbyl amine test
$(iii)$ Hofmann mustard oil test
$(iv)$ $HNO_2$ test

The product $(A)$ of the given reaction is: