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
Stem and leaf plot is a variant of: 
Select and explain. 
A. Histogram, B. Polygon, C. Pie diagram, D. None of the above
A: Histogram
Answer: A: Histogram 
Explanation: A variant of histogram is stem and leaf plot. The shape is similar to histogram except the representation is horizontal rather than veical. Ref: Medical biostatistics, 1st edition pg: 133