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: Surgery
Highest chance of success in renal transplant is possible when the donor is: September 2007, 2010 
Select and explain. 
A. Father, B. Mother, C. Twin, D. Son
C: Twin
Answer: C: Twin 
Explanation: Ans. C: Twin Isograft is a subset of allografts in which organs or tissues are transplanted from a donor to a genetically identical recipient (such as an identical twin). Isografts are differentiated from other types of transplants because while they are anatomically identical to allografts, they don't trigger an immune response.