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: Skin
[{'content': 'The most effective drug against M. leprae is: \nSelect and explain. \nA. Dapsone, B. Rifampicin, C. Clofazamine, D. Prothionamide', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B ie Rifampcin', 'role': 'assistant'}]