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 cases of medical emergencies, an invasive technique\nto deal with airway obstruction is: \nSelect and explain. \nA. Chest thrust, B. Abdominal thrust, C. Mouth to mouth resuscitation, D. Laryngoscopy', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]