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
Measurement of dispersion is: 
Select and explain. 
A. Mean, B. Mode, C. Median, D. Range
D: Range
Answer: D: Range 
Explanation: Measures of dispersion include: Range Variance Standard detion Ref: Medical biostatistics, 1st edition pg: 122