Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'E'. (Ignore the errors of punctuation, if any).
This is one of the most interesting book I have ever read.
This is one of
the most interesting book
I have
ever read.
No error
Correct answer is B
the most interesting books