This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunity, Subject name: Pathology
Graft from identical twin is defined as: 
Select and explain. 
A. Allograft, B. Isograft, C. Xenograft, D. Autograft
B: Isograft
Answer: B: Isograft 
Explanation: Ans. (b) Isograft(Ref: Robbins 9th/pg 231-234)Types of grafts QAutografts Q: transplant of individual own organIsograft: Graft from identical twinAllografts Q: between individuals of the same speciesXenografts Q: grafts from one species to another species