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': 'There is a population of 20000 people will mean hemoglobin being 13.5 gm% having a normal distribution. What propoion of population constitutes propoion more than 13-5 gm% ? \nSelect and explain. \nA. 0-25, B. 0.5, C. 1, D. 0-34', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., 0.50 o In a normal distribution, 50% of values lie above mean (or Median or Mode).", 'role': 'assistant'}]