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 case of clearing airway one of the following is not included - \nSelect and explain. \nA. Neck tilt, B. Mouth gag, C. Chin lift, D. Head lift', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]