In a patient suffering from rheumatic heart disease who has to undergo dental treatment, when are prophylactic drugs given? (Or) A 40kg man with prosthetic heart, antibiotics are given for extraction of tooth how many hours before the procedure?: (A) 3 hrs. before operation, (B) 7 days before operation, (C) 1 hr. before operation, (D) 1 day before operation
Answer is C. None