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': 'Proline is a \nSelect and explain. \nA. Natural absorbable suture material, B. Synthetic absorbable suture material, C. Natural non absorbable suture material, D. Synthetic non absorbable suture material', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]