Read the sentence below to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Choose the option with that part as your answer. If there is no error, choose 'D' as your answer. (Ignore the errors of punctuation, if any).
None of the students attending your class answered your questions. Did they?
None of the students attending your class
answered your questions.
Did they?
No error.
Correct answer is C
'did one' or 'did any'