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
Attempts to quantitate clinical conditions on a graduated scale, thereby facilitating comparison among populations examined by the same criteria and methods is: 
Select and explain. 
A. Indices, B. Survey, C. Biostatistics, D. Analysis
A: Indices
Answer: A: Indices 
Explanation: "A numerical value describing the relative status of a population on a graduated scale with definite upper and lower limits, which is designed to permit and facilitate comparison with other populations classified by the same criteria and methods". - Russell A.L. 
"Epidemiologic indices are attempts to quantitate clinical conditions on a graduated scale, thereby facilitating comparison among populations examined by the same criteria and methods" - Irving Glickman.