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': 'Which one of the following statements about leprosy is true? \nSelect and explain. \nA. Group surves for case detection are carried out when prevalence of leprosy is less than 1 per 1000, B. For determining the bacteriological index, ++ in a smear indicates 2 bacilli in every field, C. Minimum duration of treatment for paucibacillary cases is for 9 months, D. Minimum duration of treatment for multibacillary case is for 12 months', 'role': 'user'}, {'content': 'Answer: D \nExplanation: <p> Duration of Treatment for Multibacillary leprosy-MB blister packs for 12 months,within 18 months. Reference:Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:324. <\\p>', 'role': 'assistant'}]