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': 'Duration of MDR TB - \nSelect and explain. \nA. 8-12 months, B. 12-16 months, C. 16-24 months, D. 2-3 years', 'role': 'user'}, {'content': 'Answer: D \nExplanation: <p> The total duration of treatment for MDR-TB is 24-27 months,depending on IP duration. Park&;s textbook of preventive and social medicine,K.Park,23rd edition,page no:191 <\\p>', 'role': 'assistant'}]