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': 'Which of the following shows progresion of events against time - \nSelect and explain. \nA. Barchart, B. Pie chart, C. Histogram, D. Line diagram', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Line diagram* Line diagram (Line graph) is used to show the trend of events with passage of time.", 'role': 'assistant'}]