Directions: Each item in this section has a sentence with three underlined parts labelled as (a), (b) and (c). Read each sentence to find out whether there is any error in any underlined part and indicate your response on the answer sheet against the corresponding letter, i.e., (a) or (b) or (c). If you find no error, your response should be indicated as (d).

Many historians argues that (a)/ the primary reason for the collapse of the empire (b)/ was not external invasion but internal discord (c)/ No Error (d).