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
[{'content': 'Denominator in specific death rate due to coronary aery disease ? \nSelect and explain. \nA. 1000 live bih, B. Mid year population, C. Total number of deaths in a community, D. Total number of case population in community', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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".', 'role': 'assistant'}]