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': 'Systolic BP of a group of persons follows normal distribution curve. The mean BP is 120. The values above 120 are - \nSelect and explain. \nA. 25%, B. 75%, C. 50%, D. 100%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c i.e., 50%', 'role': 'assistant'}]