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
[{'content': 'Acute graft versus host disease reaction occurs in all EXCEPT \nSelect and explain. \nA. Liver, B. Adrenal, C. Gut, D. Skin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (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', 'role': 'assistant'}]