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 the following manifestations suggest the development of lymphoma is sjogren syndrome except: \nSelect and explain. \nA. High C4 Complement Levels, B. Leucopenia, C. Purpura, D. Cryoglobulinemia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Low C4 Complement levels suggest the development of lymphoma.', 'role': 'assistant'}]