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
Which of the following is used to represent continuous (quantitative) data - 
Select and explain. 
A. Bar diagram, B. Pie chart, C. Histogram, D. Map diagram
C: Histogram
Answer: C: Histogram 
Explanation: Ans. is 'c' i.e., Histogram DataScaleGraph/DiagramQuantitativeInterval scaleRatio scaleHistogramFrequency polygonfrequency curves linechart scatter diagramCumulative frequency CurveLine Chart graphQualitativeNominal scaleOrdinal scaleBar diagramPie chartPictogramMap diagram or spot map