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': 'Which of the following is not associated with Thymomas: \nSelect and explain. \nA. Red cell aplasia, B. Myasthenia gravis, C. Hypergammaglobulinemia, D. Compression of the superior mediastinum', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Hypergammoglobulinemia): Thymoma is associated with Hypogammaglobulinemia and not with hypergammaglobulinemia.', 'role': 'assistant'}]