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: Unknown
[{'content': 'This graft is \nSelect and explain. \nA. Nontextile synthetic, B. Textile synthetic, C. Nontextile biologic, D. Textile biologic', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]