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: Unknown
[{'content': 'Area under mean +/- 2 SD will include ------------% of population. \nSelect and explain. \nA. 99%, B. 95%, C. 68%, D. 50%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Refer: K. Park’s Textbook of Preventive and Social medicine, 24th edition, pg no:886 )\nNormal distribution\n\nGaussian / Standard distribution\nSymmetric with respect to same mean, median & mode & frequencies tapers off rapidly and symmetrically on both sides', 'role': 'assistant'}]