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 'E'. (Ignore the errors of punctuation, if any).
The apparently obvious solutions to most of his problems were overlook by many of his friends.
The apparently obvious solutions
to most of his problems
were overlook by
many of his friends.
No error
Correct answer is C
were overlooked by