Some of the sentences are grammatically correct and some are incorrect. Find out which part of the sentence has an error and mark that part. If there is no error , mark that part as your answer.
`("This is the second communication we have sent")/a` `("and we are much surprised")/b` `("at receiving no answer")/c` `("No error")/d`

Options

A. This is the second commu nicatiori we have sent
B. at receiving no answer.
C. and we are much surprised
D. No error

Answer

A

Explanation

As the sense suggests, This is the second communication we are sending is the right usage.