This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fundamental concepts, Subject name: Anaesthesia
[{'content': 'ASA classification is done for \nSelect and explain. \nA. Fasting, B. Risk, C. Pain, D. Lung capacity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]