question_answer

Some of the following sentences are grammatically incorrect and some are correct. Find out which part of a sentence has an error and mark that part. If there is no error, your answer is (d).

A) \[\frac{\text{They had been}}{(a)}\]                      

B) \[\frac{\text{very close friends }}{(b)}\]

C)                 \[\frac{\text{unless they quarrelled}.\text{ }}{(c)}\]       

D) \[\frac{\text{No error}.}{(d)}\]