This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Data Variables, Subject name: Social & Preventive Medicine
[{'content': 'Correlation between two variables is plotted in- \nSelect and explain. \nA. Pie chart, B. Histogram, C. Frequency polygon, D. Scatter diagram', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 6d' i.e., Scatter diagram DataMethodFrequency of occurrence (comparisons of magnitude)Bar Chart Pie chartTrends over timeLine graphDistribution (not related to time)Histogram, Frequency polygonAssociation(Looking for correlation between two variables)Scatter diagram", 'role': 'assistant'}]