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: Social & Preventive Medicine
[{'content': 'Which of the following drugs has the highest bactericidal activity against Mycobacterium leprae? \nSelect and explain. \nA. Rifampicin, B. Clofazimine, C. Dapsone, D. Minocycline', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Rifampicin has a high bactericidal activity against M. leprae. A single dose of 1500 mg appears to kill 99% of the organisms. Ref: Park 21st edition, page 296.', 'role': 'assistant'}]