Read the sentence below to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Choose the option with that part as your answer. If there is no error, choose 'D' as your answer. (Ignore the errors of punctuation, if any).
Arun's parents died when he was young and he looked after his aunt who had no children.
Arun's parents died when he was young and
he looked after his aunt
who had no children.
No error.
Correct answer is B
he was looked after by his aunt