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: Surgery
[{'content': 'In emergencies apart from trauma best method for airway maneuver: \nSelect and explain. \nA. Head tilt and chin lift., B. Jaw thrust., C. Chin lift., D. Head tilt.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]