* Dentist is meant for the treatment of the ailments of teeth, gums, and the entire mouth. There is no need to repeat the duty of the dentist. Statements (b) and (c) are not suitable to the occassion.
A did not mention what is the patient being treated for. B + C refering to a tooth. Don't know anything about grammar, but just want to point out that A is very different from B + C
You seem to be careless about the minimum manners, and etiquette to be maintained while dealing with the members of English forum. First, you better go to an institute and learn the interpersonal skills before discussing in the English forum. It is to bring to your notice that no one is perfect on this planet. Knowledge is endless, wherein learning is a continuous process. I am not feeling my