Each question in this section has a sentence with three underlined parts labelled (a), (b) and (c). Read each sentence to find out whether there is any error in any underlined part and indicate your answer in the Answer Sheet against the corresponding letter i.e. (a) or (b) or (c). If you find no error, your answer should be indicated as (d).
`("She is very weak in the subject")/((a))("and does not understand things")/((b))("though the teacher explains her repeatedly")/((c))("No error")/((d))`