This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aerial disorders, Subject name: Surgery
[{'content': 'Re-implantation time for lower limb is: \nSelect and explain. \nA. 6 hours, B. 8 hours, C. 10 hours, D. 12 hours', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ischemic time for digits is upto 8 hours. Ischemic time for extremities is 4-6 hours. Organ containing bag should be placed in a solution of saline with ice.', 'role': 'assistant'}]