<prompt> Highest chance of success in renal transplant is possible when the donor is: September 2007, 2010FatherMotherTwinSon  <response>: 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 dont trigger an immune response. 