This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Measures of Central Tendency and Distribution, Subject name: Social & Preventive Medicine
[{'content': 'Systolic BP of a group of person 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% in the normal distribution curve 50% of values lies on either side of the mean .Therefore values lying above 120 (which is the mean B.R) are 50%", 'role': 'assistant'}]