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 traumatic injury to common femoral vein & external femoral aery, which among the following should be done ? \nSelect and explain. \nA. Ligation of both aery & vein, B. Repair of aery & vein, C. Below knee amputation, D. Repair of aery and contralateral sympathectomy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e. Repair of aery & vein", 'role': 'assistant'}]