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': 'Dispersion of data is measured by -a) Coefficient of correlationb) Rangec) Standard deviationd) Coefficient of variatione) Normal distribution curve \nSelect and explain. \nA. a, B. c, C. ac, D. bcd', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Measure of dispersion (Variation)\n\nAbsolute: Range, Quartile deviation, Mean deviation, standard deviation.\nRelative: Co-efficient of range, co-efficient of quartile deviation, coefficient of mean deviation, co-efficient of variation.', 'role': 'assistant'}]