This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
[{'content': 'Antibiotic that can be used as  antiplaque agent is/are: \nSelect and explain. \nA. Penicillin., B. Vancomycin., C. Kanamycin., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Penicillin, vanomycin, kanamycin have been used as antiplaue agents but their use has been considerably reduced due to bacterial resistance and hypersensitivity reactions.', 'role': 'assistant'}]