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
[{'content': 'Ranking students from the individual which the highest\ngrade — point average to the lowest is an example of a (an) \nSelect and explain. \nA. Ordinal scale, B. Nominal scale, C. Interval scale, D. Ratio scale', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]