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
[{'content': 'If the grading of diabetes is classified as mild, moderate and severe the scale of measurement used is: \nSelect and explain. \nA. Interval, B. Nominal, C. Ordinal, D. Ratio', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ordinal', 'role': 'assistant'}]