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).
Block of Residential flats are coming up near our house.
Block of Residential flats
are coming up
near our house.
No error
Correct answer is A
Blocks of Residential flats