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).
In spite of several reminders, he did not so far send any reply to me, letters.
In spite of several reminders,
he did not so far send
any reply to me, letters.
No error.
Correct answer is B
he has not so far sent