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': 'Measurement of dispersion is: \nSelect and explain. \nA. Mean, B. Mode, C. Median, D. Range', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Measures of dispersion include: Range Variance Standard detion Ref: Medical biostatistics, 1st edition pg: 122', 'role': 'assistant'}]