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': 'Non absorbable suture material is \nSelect and explain. \nA. Catgut, B. Fascialata, C. Polyglycolic, D. Nylon', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]