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': 'In the question, data has been divided into two groups, i.e. HIV positive/HIV negative Data should be measured on nominal scale especially Dichotomous type of nominal scale. \nSelect and explain. \nA. Interval scale data, B. Ordinal scale data, C. Categorical data, D. None', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Categorical data Blood group is a qualitative (Categorical) data. Blood group are divided into qualitative categories (A, B, AB, 0) -3 Nominal Scale Data.", 'role': 'assistant'}]