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
Poverty line is defined as expenditure required for daily calorie consumption below 
Select and explain. 
A. 1800, B. 2100, C. 2000, D. 2200
B: 2100
Answer: B: 2100 
Explanation: None