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
One TB unit is recommended for how much population in Hilly areas ? 
Select and explain. 
A. 50,000, B. 100,000, C. 150,000, D. 250,000
D: 250,000
Answer: D: 250,000 
Explanation: Ans. is 'd' i.e., 250,000