Antibiotic that can be used as  antiplaque agent is/are:: (A) Penicillin., (B) Vancomycin., (C) Kanamycin., (D) All of the above.
Answer is D. Penicillin, vanomycin, kanamycin have been used as antiplaue agents but their use has been considerably reduced due to bacterial resistance and hypersensitivity reactions.