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': 'Median weight of 100 children was 12 kgs. The standard detion was 3. Calculate the percent coefficient of variance: \nSelect and explain. \nA. 25%, B. 35%, C. 45%, D. 55%', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Coefficient of variance = (SD/mean)x100 = (3/12)x100 = 25 Ref: Park 21st edition, page 787.', 'role': 'assistant'}]