When chloroform is treated with a primary amine and $KOH$,what is the characteristic smell of the product formed?

In the given reaction $A$ is :- $A$ $\xrightarrow{\text{Reduction}} B$ $\xrightarrow{HNO_2} C_2H_5OH$

Identify what is $Y$ in the following reaction sequence?
$CH_3CONH_2$ $\xrightarrow{Br_2/NaOH(aq)} X$ $\xrightarrow[(ii) H_2O]{(i) NaNO_2 + HCl} Y$

Aniline,when diazotized in cold and then treated with $N,N$-dimethylaniline,gives a coloured product. Its structure would be:

Aniline under acidic medium,when chlorinated,produces :

The correct statements about the products $B$ and $C$ in the given reactions are
$CH_3CH_2OH$ $\xrightarrow[\text{Anhy } ZnCl_2]{HCl} A$ $\xrightarrow[\text{AgCN}]{\text{ethanolic}} \underset{\text{Minor}}{B} + \underset{\text{Major}}{C}$
$I$. $B$ and $C$ are functional isomers
$II$. With $H_2 / \text{Catalyst}$,$B$ gives $1^{\circ}$ amine and $C$ gives $2^{\circ}$ amine
$III$. $B$ on acid hydrolysis gives formic acid and $C$ gives $C_3H_6O_2$
$IV$. $C$ forms isocyanate with $HgO$