This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycobacterial Diseases (TB, Leprosy and MAC), Subject name: Pharmacology
[{'content': 'In leprosy, the best bactericidal agent is: \nSelect and explain. \nA. Clofazimine, B. Dapsone, C. Rifampicin, D. Ethionamide', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Best bactericidal agent in leprosy: Rifampicin, given once monthly in leprosy and once daily in TB. Bacteriostatic agent in leprosy: clofazimine and dapsone.', 'role': 'assistant'}]