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
One TB unit is recommended for how much population in Hilly areas - 
Select and explain. 
A. 50, B. 100,000, C. 150,000, D. 250,000
D: 250,000
Answer: D: 250,000 
Explanation: 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)