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
Denominator in specific death rate due to coronary aery disease ? 
Select and explain. 
A. 1000 live bih, B. Mid year population, C. Total number of deaths in a community, D. Total number of case population in community
B: Mid year population
Answer: B: Mid year population 
Explanation: Ans. is 'b' i.e., Mid year population Crude death rate It is the simplest measure of moality. It is defined as "the number of death (from all causes) per 1000 estimated mid-year population in one year, in a given place".