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).

He is not coming tomorrow as he is having a pain in the chest and has to see a doctor.

A.

He is not coming tomorrow

B.

as he is having a pain in the chest

C.

and has to see a doctor.

D.

No error.

Correct answer is C

and he has to see a doctor