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
Following age pyramid denotes 
Select and explain. 
A. Developing country, B. Developed country, C. Underdeveloped country, D. Poor country
B: Developed country
Answer: B: Developed country 
Explanation: The pyramid of developing country (e.g. India) has a broad base and a tapering top.
In developed countries, the pyramid generally shows a bulge in the middle and has a narrower base (as in figure given in the question).