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
A mother donated a kidney to her daughter having chronic renal failure, which kind of graft it represents: 
Select and explain. 
A. Allo, B. ISO, C. Xeno, D. Auto
A: Allo
Answer: A: Allo 
Explanation: None