This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, Subject name: Social & Preventive Medicine
[{'content': 'Normal curve \nSelect and explain. \nA. Distribution of data is symmetrical, B. Mean > Mode, C. Mode > Mean, D. Median > Mean', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref:Parks 23rd edition pg 849 Stadardised normal curve : Smooth, bell-shaped, perfectly symmetrical curve based on an infinitely large number of observations . Total area of the curve= 1 Mean= 0 Standard detion = 1 Mean, median and mode all coincide.', 'role': 'assistant'}]