This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Surgery
[{'content': 'The following are indications for performing thoractomy after blunt injury of the chest, except \nSelect and explain. \nA. 1500 ml drainage after placing an intercostal tube, B. Continuous bleeding through intercostal tube more than 200 ml\\/hour for three or more hours, C. Cardiac tamponade, D. Rib fracture', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Indications for thoracotomy include haemothorax more than 1500 ml after placing intercostal tube(ICT)or hourly collection of 200-300 ml or ICT placed showing persistent drainage of blood.haemopericardium leading to cardiac tamponade is an another indication.Other indications include diaphragmatic injury,bronchus & major vessel injuries,oesophageal & thoracic duct injuries.', 'role': 'assistant'}]