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': 'Which is a non absorbable suture ? \nSelect and explain. \nA. Polypropylene, B. Polyglycolic acid, C. Collagen, D. All', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Polypropylene", 'role': 'assistant'}]