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': 'The following are indications for performing thoracotomy after blunt injury of the chest, except - \nSelect and explain. \nA. 1000 ml drainage after placing intercostal tube, B. Continuous bleeding through intercostal tube of more than 200 ml/hour for three or more hours, C. Cardiac tamponade, D. Rib fracture', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]