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: Dental
[{'content': 'Change in event with respect to time is best depicted by? \nSelect and explain. \nA. Bar diagram, B. Line diagram, C. Pie chart, D. Dot diagram', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]