This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Biostatistics, 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: Scales can be: Qualitative: Categorical scales: Nominal : eg: names of countries . Dichotomous : eg: yes/no, presence/absence. Ordinal : severity of disease: mild/moderate/severe.eg: staging of cancer, kuppusamy socioeconomic class. Quantitative: Metric scales: Interval Ratio', 'role': 'assistant'}]