This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and Family Planning, Subject name: Social & Preventive Medicine
[{'content': 'Demographic gap means: \nSelect and explain. \nA. Difference between male and female population, B. Difference between birth rate and death rate, C. Difference between age specific birth rate and age specific death rate, D. Difference between male and female life expectancy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: b (Difference between birth rate and death rate)Demographic gap is the difference between birth rate and death rateNote:Demographic cycle has 5 stages* High stationary* Early expanding* Late expanding* Low stationary* DecliningIndia has entered the third stage that is late expanding stageAge structure of a population is best represented by Age pyramid', 'role': 'assistant'}]