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: Medicine
[{'content': 'All of the following conditions are associated with thymoma except? \nSelect and explain. \nA. Myasthenia gravis, B. Pemphigus foliaceus, C. Pancytopenia, D. Hypergamma globulinemia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Thymoma is associated with B cell deficiency and hypogamma globulinemia. Other conditions associated with thymoma are myasthenia gravis, autoimmune hemolytic or aplastic anemia, pancytopenia, thrombotic thrombocytopenic purpura, pemphigus foliaceus, sjogren's syndrome, polymyositis.", 'role': 'assistant'}]