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 of the following structures is fixed first during reimplantation of an amputated digit: \nSelect and explain. \nA. Bone, B. Aery, C. Vein, D. Nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bone is the first structure to be fixed during reimplantation of an amputated digit. Ref: Trauma, by Charles M. Cou Brown, Margaret M, Page 483.', 'role': 'assistant'}]