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': 'Graph to compare two quantitative data is? \nSelect and explain. \nA. Histogram, B. Scatter diagram, C. Line Diagram, D. Frequency curve', 'role': 'user'}, {'content': "Answer: B \nExplanation: - scatter maps show the relationship between two variables - if dots cluster round a straight line, it shows evidence of relationship of a linear nature. If there is no such cluster, it is probable that there is no relationship between the variables. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:847", 'role': 'assistant'}]