This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'true about graft versus host disease is \nSelect and explain. \nA. Associated with solid organ transplantation, B. Graft must contains immunocompetent T cells, C. It is seen in immunosuppressant persons, D. Also called as runt disease', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref Robbins 9/e p232-233 Graft versus host reaction occurs in any situation in which immunological competent cells or there precursor are transplanted into immunological crippled recipient cells and the transfer cells recognize alloantigens in the host', 'role': 'assistant'}]