This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Kidney, Subject name: Medicine
[{'content': 'Least chance of infection during dialysis is by? \nSelect and explain. \nA. AV fistula, B. Tunnel catheter, C. Venous catheter, D. AV graft fistula', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The best type of long-term access is an AV fistula. A surgeon connects an aery to a vein, usually in your arm, to create an AV fistula. ... The AV fistula is a blood vessel made wider and stronger by a surgeon to handle the needles that allow blood to flow out to and return from a dialysis machine and has least chance of Infections Ref Harrison20th edition pg 233', 'role': 'assistant'}]