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 ideal treatment for hemothorax of blood loss greater than 500 ml/hour - \nSelect and explain. \nA. Wait and watch, B. Needle aspiration, C. Intercostal tube, D. Open thoracotomy with ligation of vessel', 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is 'd' i.e. Open thoracotomy with ligation of vessel", 'role': 'assistant'}]