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': 'All of the following are example of nominal scale except - \nSelect and explain. \nA. Race, B. Sex, C. Body weight, D. Socio-economic status', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Body weight o Weight is a quantitative variable, while nominal scale is used for qualitative variables.", 'role': 'assistant'}]