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: Dental
Contraction of Demographic-Gap starts in: 
Select and explain. 
A. Stage I, B. Late Stage II, C. Early Stage III, D. Stage IV
B: Late Stage II
Answer: B: Late Stage II 
Explanation: Demographic Cycle and Concepts

Demographic cycle is closely related to: Socio-economic progress of a country
5 stages (phases) of demographic cycle through which a nation passes