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
Ranking students from the individual which the highest
grade — point average to the lowest is an example of a (an) 
Select and explain. 
A. Ordinal scale, B. Nominal scale, C. Interval scale, D. Ratio scale
A: Ordinal scale
Answer: A: Ordinal scale 
Explanation: None