This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'Standard detion is a measure of- \nSelect and explain. \nA. Central tendency, B. Detion from mean, C. Standard error, D. Skewness', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ref: Parks 23rd edition pg 849 Standard detion: Gives idea of the spread or dispersion Lager the standard detion value , greater is the dispersion of values about the mean.', 'role': 'assistant'}]