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': 'Leprosy is considered a public health problem if the prevalence of leprosy is more than \nSelect and explain. \nA. 2 per 10,000, B. 1 per 10,000, C. 5 per 10,000, D. 10 per 10,000', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]