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 does not depend on- \nSelect and explain. \nA. Standard detion, B. Median, C. Range, D. Sample size', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]