What is the product formed when acetamide is reacted with $Br_2$ and caustic soda $(NaOH)$?

In the reaction sequence $A$ $\xrightarrow{Sn/HCl} B$ $\xrightarrow{HNO_2, 0^{\circ}C} C$ $\xrightarrow{C_2H_5OH} C_6H_6$,identify the functional groups present in $A, B,$ and $C$.

In the $Hofmann$ bromamide degradation reaction,the number of moles of $NaOH$ and $Br_2$ used per mole of amine produced are:

In the reaction $CH_3Br + KCN_{(alc)} \to X \xrightarrow[Na + C_2H_5OH]{reduction} Y$,identify $Y$.

Which of the following give Hofmann's degradation reaction?

In the chemical reaction given above,$A$ and $B$ respectively are: