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: Microbiology
[{'content': 'A mother donated a kidney to her daughter having chronic renal failure, which kind of graft it represents: \nSelect and explain. \nA. Allo, B. ISO, C. Xeno, D. Auto', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]