This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
Crude bih rate is a simplest measure of feility because it includes 
Select and explain. 
A. Total population, B. Mid year population, C. Live bihs only, D. Pre term bihs
B: Mid year population
Answer: B: Mid year population 
Explanation: Crude bih rate : Number of live bihs in a year per 1000 mid-year population CBR is simplest indicator of feility : Total mid-year population is not exposed to Child bearing thus it doesnot give true idea of feility Ref: Park 25th edition Pgno : 539