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': 'The trend of wents with passage of time is best shown method \nSelect and explain. \nA. Line diagram, B. Scatter diagram, C. Pia chart, D. Histogram', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Line diagram is guantitative data.\nIt shows trend of an event a period of time.', 'role': 'assistant'}]