The correct answer is: A. Physician : Patient
A druggist is a person who works in a pharmacy, which is a place where people can buy medicine. A physician is a person who is qualified to diagnose and treat illnesses, and a patient is a person who is
receiving medical treatment from a physician.In each of the other options, the two words do not have the same relationship as druggist and pharmacy. A carpenter is a person who builds things out of wood, but wood is not the only thing that a carpenter can build with. A librarian is a person who works in a library, which is a place where people can borrow books and other materials, but a catalogue is not the only thing that a librarian can use. A chef is a person who cooks food, but a restaurant is not the only place where a chef can cook food.