This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organ Transplant / Graft, Subject name: Pathology
Which of the following is the most appropriate term for a graft when donor and recipient are identical twins? 
Select and explain. 
A. Xenograft, B. Allograft, C. Isograft, D. Autograft
C: Isograft
Answer: C: Isograft 
Explanation: GRAFTS: Autograft- Self ; Skin/Hair grafting. Allograft- Different person from same species. Isograft- Identical twin. Xenograft- Different species; valvular replacement.