Identify the Hinsberg reagent from the following.

An aromatic compound $A$ reacts with $Zn/NH_4Cl$,and the filtrate is then added to an ammoniacal silver nitrate solution,resulting in a black precipitate. Which group does compound $A$ contain?

Which of the following amines will give the carbylamine test?

Cyclohexylamine and aniline can be distinguished by

$A$ compound $X$ on reaction with chloroform and $NaOH$ gives a compound with a very unpleasant odour. $X$ is

Given below are two statements:
Statement $I$: All the following compounds react with $p$-toluenesulfonyl chloride:
$C_6H_5NH_2$
$(C_6H_5)_2NH$
$(C_6H_5)_3N$
Statement $II$: Their products in the above reaction are soluble in aqueous $NaOH$.
In the light of the above statements,choose the correct answer from the options given below.