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': 'Listing conditions in some order of severity without attempting to define any mathematical relation between categories is \nSelect and explain. \nA. Nominal scale, B. Ordinal scale, C. Interval scale, D. Ratio scale', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]