Answer: Option (a) is the correct answer.
Explanation:
When solvents which contain a hydrogen atom attached to an electronegative atom then they are known as protic solvents.
For example, in [tex]CH_{3}OH[/tex] the hydrogen atom is attached to electronegative oxygen atom.
Hence, methanol [tex](CH_{3}OH)[/tex] is a protic solvent.
In [tex](CH_{3})_{3}N[/tex], the hydrogen atoms are attached to carbon atom which is not electronegative in nature.
Hence, [tex](CH_{3})_{3}N[/tex] is not a protic solvent but it is an aprotic solvent.
In [tex]NF_{3}[/tex], there is no hydrogen. Hence, it is also not protic solvent.
Thus, we can conclude that out of the given options [tex]CH_{3}OH[/tex] is a protic solvent.
