This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disease Causation, Measurements, Milestones, Subject name: Social & Preventive Medicine
[{'content': 'About Direct standardization all are true except: \nSelect and explain. \nA. Age specific death rate is not needed, B. A standard population is needed, C. Population should be comparable, D. Two populations are compared', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Standardization is done to compare the death rate of two populations with different age composition. Direct Standardization Indirect Standardization Method Use actual ASDRs* on the standard age structure Use Standard ASDRs* on the actual age structures Utility when 1. No. of deaths in each age group 2. Population in each age group Both are available Both are unavailable (ASDR*: Age Specific Death Rate)', 'role': 'assistant'}]