One of the statements below contains a word used incorrectly. Choose the option which has the incorrect or inappropriate usage of the word.

The words "critic" and "critique" are related but have different meanings and grammatical functions. We examine each of the options individually to analyse whether the words have been used properly in the correct context.

A. The emperor ordered the arrest of his most vocal critic.
The word "critic" is correctly used here. It refers to a person who expresses disapproval or finds fault.

B. There are very few film critics left in our city.
The word "critics" is correctly used. It means people who review and evaluate films professionally.

C. Mahatma Gandhi's critic of the West remains relevant to this day.
Here, "critic" is incorrectly used. The sentence intends to say Gandhi’s criticism or critical views of the West, not a person. The correct word should be "critique" or "criticism."

D. His classmates warned him, "It is not a good idea to critique our Principal.
The word "critique" is correctly used here as a verb meaning to review or evaluate.

Option C is the correct answer in this case, as it misuses "critic" where "critique" or "criticism" should have been used.