This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Health Planning and Management, Subject name: Social & Preventive Medicine
[{'content': 'One TB unit is recommended for how much population in Hilly areas - \nSelect and explain. \nA. 50, B. 100,000, C. 150,000, D. 250,000', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., 250,000Infrastrucilure in RNTCPOne microscopy center100,000 population in planes50,000 population in hilly/mountain areasOne Tuberculosis unit500,000 population in planes250,000 population in hilly/tribai areasOne district tubercular center (DTC)Per revenue districtOne state drug store (SDS)50 million populationOne senior TB laboratory supervisor (STLS)Every 5 microscopy centers (5 lac population)", 'role': 'assistant'}]