This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Not associated with thymoma is \nSelect and explain. \nA. Red cell aplasia, B. Myasthenia gravis, C. Hypergammaglobulinemia, D. Compression of the mediastinum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Hypogammaglobulinemia is seen in thymoma not Hypergammaglobulinemia . ref harrisons internal medicine 20e p2496 , 729 ,3232, 3237', 'role': 'assistant'}]