This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'In lepromatous leprosy the single drug dapsone is continue for - \nSelect and explain. \nA. 9 days, B. 90 days, C. 1 years, D. 10 years', 'role': 'user'}, {'content': "Answer: C \nExplanation: In lepromatous leprosy the single drug is continued to one year. REF. PARK'S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 21ST EDITION. PAGE NO - 297", 'role': 'assistant'}]