This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Dacron vascular graft is \nSelect and explain. \nA. Nontextile synthetic, B. Textile synthetic, C. Nontextile biologic, D. Textile biologic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .Aneurysm is excised and the aerial graft either PTFE (Polytetrafluoroethylene), knitted dacron graft, or woven dacron graft is placed. The graft is sutured to the vessel above and below using monofilament, nonabsorbable suture material, polypropylene 5-zero. ref:SRB;s manual of surgery,ed 3,pg no 170', 'role': 'assistant'}]