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': "Sallick's manouvere is used for – \nSelect and explain. \nA. To prevent gastric aspiration, B. To facilitate Respiration, C. To reduce dead space, D. To prevent alveolar collapse", 'role': 'user'}, {'content': "Answer: A \nExplanation: Sellick's manoeuvre is the application of back-ward pressure on cricoid cartilage to prevent regurgitation of gastric contents and its leaking into respiratory tract.", 'role': 'assistant'}]