This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Definition & Concepts, Subject name: Social & Preventive Medicine
Vital statistics in a population include:- 
Select and explain. 
A. Sex ratio, B. Age composition, C. Bih rate, D. Dependency ratio
C: Bih rate
Answer: C: Bih rate 
Explanation: Population statistics Vital statistics Population size Sex ratio Density of population Dependency ratio Bih rate, death rate Natural growth rate Life expectancy at bih Moality rates Feility rates