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
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% ? 
Select and explain. 
A. 0-25, B. 0.5, C. 1, D. 0-34
B: 0.5
Answer: B: 0.5 
Explanation: Ans. is 'b' i.e., 0.50 o In a normal distribution, 50% of values lie above mean (or Median or Mode).