Explanation

(c)
Amides react with bromine and caustic soda to give their corresponding primary amines. Thus, acetamide gives methanamine. This reaction is known as Hofmann’s bromamide degradation reaction.
$O$
$||$
$H_{3}C - C - NH_{2} + Br_{2} + 4KOH\overset{343\ K\ \ \ \ }{\rightarrow}2KBr + K_{2}CO_{3} + H_{3}C - NH_{2} + 2H_{2}O$
acetamide methanamine