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': 'Correlation between two variables are best depicted by \nSelect and explain. \nA. bar diagram, B. Line diagram, C. histogram, D. scatter diagram', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]