Our office building comprises (A)/ seven floors and a restaurant at the top in an (B)/ area of about eight hundred sq. metres.(C)/ No error
I took an exam which had English comprehension as one of its section, today its provisional key came out. I marked the answer of above sentence as No error but as per key the answer is B part. Can anyone tell me what's wrong in part B ? I think the answer of key is wrong, if it is I can submit representation for it.