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).
Students should not take part in party politics and political demonstrations as they interfere in serious study.
Students should not take part
in party politics and political demonstrations
as they interfere in serious study
No error.
Correct answer is C
as they interfere with serious study