Directions: The following sentence is divided into four parts (a), (b), (c), (d). One of the given parts is grammatically incorrect. You have to detect the error and indicate your choice. If there is no error mark '(e)' in the answer choice.

None of the boys who had (a)/ joined the coaching class (b)/ absented himself (c)/ even for a day. (d)/ No error (e)