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': 'In a normal curve, the area of one standard detion around the mean includes which of the following per cent of values in a distribution - \nSelect and explain. \nA. 48.60%, B. 68.30%, C. 95.40%, D. 99.70%', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 68.3%", 'role': 'assistant'}]