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': 'The qualitative data can be presented by : \nSelect and explain. \nA. Bar diagram, B. Histogram, C. Line diagram, D. Scattered Diagram', 'role': 'user'}, {'content': 'Answer: A \nExplanation: For Quantitative data:\n\nHistogram —variables on X-axis is called "abscissa” and frequency marked on Y-axis is called\xa0 "ordinate".\nFrequency polygon — indicated when sets of data to be elicited on same diagram.\n\nBell/normal curve is the most common type of frequency polygon. It resembles a smooth curve.\n\nLine diagram.\nScatter/Dot/correlation diagram — shows the nature of correlation between 2 variables. If the dots cluster\xa0around a straight line, it shows a linear relationship.', 'role': 'assistant'}]