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
Acute graft versus host disease reaction occurs in all EXCEPT 
Select and explain. 
A. Liver, B. Adrenal, C. Gut, D. Skin
B: Adrenal
Answer: B: Adrenal 
Explanation: (Adrenal) (125 - R) (134- Basic pathology 8th)* Two major problems complicate this form of transplantation bone marrow transplant rejection and graft versus host disease (GVHD)* Acute graft versus host disease (occurring due to weeks after transplant) causes epithelial necrosis in three principal target organs - liver, gut and skin