This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
[{'content': 'Median is important for all except: \nSelect and explain. \nA. Incubation period, B. Survival time, C. Blood pressure, D. Health expenses', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Applications of Central Tendency', 'role': 'assistant'}]