This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Definition and Concepts, Examples from NHPs, Subject name: Social & Preventive Medicine
[{'content': 'Kaplan Meier method is used for estimating :- \nSelect and explain. \nA. Incidence, B. Frequency, C. Prevalence, D. Survival', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Kaplan Meier Survival Curve is used to estimate survival. -The area under the curve gives cumulative survival.', 'role': 'assistant'}]