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).
We are happy to know that the project completed strictly as per the schedule.
We are happy
to know that
the project completed
strictly as per the schedule.
No error
Correct answer is C
the project was completed