What is formed when $RCN$ is treated with sodium and alcohol?

In a set of reactions,$m$-bromobenzoic acid gave a product $D$. Identify the product $D$.
$m$-bromobenzoic acid $\xrightarrow{SOCl_2} B$ $\xrightarrow{NH_3} C$ $\xrightarrow{Br_2, NaOH} D$

$CH_3CONH_2 \xrightarrow{Na + ROH} Z + H_2O$. What is $Z$?

When acetamide is treated with $NaOBr$,the product formed is

Identify the product formed in the following reaction sequence:

Which of the following nitrogen compounds gives a primary amine upon reaction with $Br_2$ and strong $KOH$ (Hofmann bromamide degradation reaction)?