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': 'Standarised moality rate is standardised for \nSelect and explain. \nA. Age, B. Disease, C. Region, D. A paicular time period', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .rates are only comparable if the populations upon which they are based are comparable.age adjustment or"age standardisation removes the confounding effect of different age structures and yields a single standardized or adjusted rate by which the moality experience can be compared directly.the adjustment can also be made for sex,race,parity etc. ref:park&;s textbook,ed 22,pg no 56', 'role': 'assistant'}]