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': 'Opinion of a people for a test was expressed as very satisfied, dissatisfied, very dissatisfied: \nSelect and explain. \nA. Nominal, B. Ordinal, C. Interval, D. Ratio', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ordinal', 'role': 'assistant'}]