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': 'From the scheme given below, choose the appropriate\norder of priorities in the management of a patient with polytrauma:\n1.\tControl of external haemorrhage\n2.\tIntravenous infusion and transfusion\n3.\tMaintenance of patent airway\n4.\tRelief of a tension pneumothorax.\n5.\tSplinting of fractures. \nSelect and explain. \nA. 1,5,2,3,4, B. 3,4,1,2,5, C. 4,1,5,3,2, D. 2,1,5,3,4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]