This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Epidemiology, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following is used to compare the death rates of two different populations? \nSelect and explain. \nA. Crude death rate, B. Age specific death rate, C. Age standardized death rate, D. Propoional moality rate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: If we want to compare the death rates of two populations with different age composition, the crude death rate is not a right yardstick.Age standardization removes the confounding effect of different age structures and yields a single standardized or adjusted rateref:park&;s textbook,ed23,pg 58', 'role': 'assistant'}]