This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rejection of Transplants, Subject name: Pathology
Xenograft means transplanting organs from? 
Select and explain. 
A. One species to another, B. Member of same species, C. Twin to twin, D. One site to another in an individual
A: One species to another
Answer: A: One species to another 
Explanation: ANSWER: (A) One species to anotherREF: Textbook of Microbiology & Immunology by Parija page 168Transfer of individual's own tissue or organ fron one site to another site in the body i.e. recipient is also the donor, eg skin grafting, coronary artery bypass grafting Transfer of tissue between two genetically identical individuals l.e. identical twins.Unless technical problems hi surgery, they are always successful. Transfer of tissue or an organ between genetically different Individuals of same species, i.e. from one human to another. This is predominant transplant today. Transfer of tissue or an organ between members of different spedes. 1 is always rejected by an immunocompetent host