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': 'Two variables can be plotted together in ? \nSelect and explain. \nA. Pie cha, B. Histogram, C. Frequency polygon, D. Scatter diagram', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Scatter diagram", 'role': 'assistant'}]