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 'D'. (Ignore the errors of punctuation, if any)
This is the new (a)/ book ''One Night @ the Call Centre'' authored by Chetan Bhagat which my father (b)/ bought it (c)/ for you (d)/ No error (e)

Answer

c

Explanation

The use of "it" is superfluous here.