This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Social & Preventive Medicine
[{'content': 'The "Crude death rate" is defined as "the number of deaths (from all causes) per 1000 estimated". \nSelect and explain. \nA. Total population, B. Total births, C. Mid year population, D. Live births', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (C) Mid year population # Crude death rates lack comparability for communities with populations that differ by age, sex, race etc.> Crude Death Rate: Number of deaths /1000 population/year in a given community deglt indicates the rate at which people are dying The usefulness of Crude death rate is restricted because it is influenced by the age-sex composition of the population', 'role': 'assistant'}]