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
Type of graft, best suited for renal transplantation - 
Select and explain. 
A. Allograft, B. Autograft, C. Xenograft, D. Isograft
D: Isograft
Answer: D: Isograft 
Explanation: Although the best graft is-autograft, a renal graft can obviously not be an autograft.
So the best renal graft is an isograft.