Answer: Option (c) is the correct answer.
Step-by-step explanation:
An organic compound that contains the functional group "
" is known as an amide.
General chemical formula of an amide is
, where R can be alkyl or aryl group.
For example,
is a primary amide whose name is ethanamide.
A compound that contains a functional group "-NCO" is known as an isocyanate group.
And, "-CN" functional group is known as cyanate group.
is a compound called sodamide and it is a specific formula.
Hence, we can conclude that the most basic general formula for the amide is
.