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': 'Most peripheral laboratory under RNTCP \nSelect and explain. \nA. Peripheral Reference laboratory, B. Designated microscopy centre, C. Tuberculosis unit, D. Intermediate Reference laboratory', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]