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: Anaesthesia
[{'content': 'Laryngeal mask Airway (LMA) is used for; \nSelect and explain. \nA. Maintenance of the airway, B. Facilitating laryngeal surgery, C. Prevention of aspiration, D. Removing oral secretions', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Maintenance of airway', 'role': 'assistant'}]