This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
A woman with infeility receives an ovary transplant from her sister who is an identical twin. What type of graft it is? 
Select and explain. 
A. Xenograft, B. Autograft, C. Allograft, D. Isograft
D: Isograft
Answer: D: Isograft 
Explanation: The graft is the tissue or organ transplanted. A graft taken from individual and placed on another individual of the same genetic constitution is called isograft. Examples are graft made between identical twins or between syngeneic members of highly inbred strains of animals. Reference : Anathanarayan & paniker's 9th edition, pg no:183 <\p>