This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sutures and Anastomoses, Subject name: Surgery
[{'content': 'Which of the following is the preferred suture material for vascular anastomosis? \nSelect and explain. \nA. Non-absorbable, elastic, B. Non-absorbable, non-elastic, C. Absorbable, elastic, D. Absorbable, non-elastic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Non-absorbable, non-elastic suture (prolene) is the preferred suture material for vascular anastomosis.e.g. polypropylene."', 'role': 'assistant'}]