Read the sentence to find out whether there is any error in it or not. The error, if any, will be in one part of the sentence. The number of that part (which has the error) is the answer. If there is no error, the answer is (5). Ignore errors of punctuation, if any.

Compulsive and repetitive use may (A)/ result in tolerant to the effect (B)/ of the drug and withdrawal symptoms (C)/ when use is reduced or stopped. (D)