This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'GVHD - \nSelect and explain. \nA. Associated with solid organ transplantation, B. Graft must contains immunocompitant T-cell, C. It is seen in immunosupressed persons, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'a' i.e., Associated with solid organ transplantation; 'b' i.e., Graft must contains immunocompetant T-cell; 'c' i.e., It is seen in immunosupressed persons", 'role': 'assistant'}]