This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Transplantation, Subject name: Surgery
Transplantation of which one of the following organs is most often associated with hyper acute rejection? 
Select and explain. 
A. Heart, B. Kidney, C. Lungs, D. Liver
B: Kidney
Answer: B: Kidney 
Explanation: Ans. (b) KidneyRef: Bailey 26th edition, Page 1409* Hyperacute rejection is most common in Kidney* Hyperacute rejection is very rare in liver