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
All the following manifestations suggest the development of lymphoma is sjogren syndrome except: 
Select and explain. 
A. High C4 Complement Levels, B. Leucopenia, C. Purpura, D. Cryoglobulinemia
A: High C4 Complement Levels
Answer: A: High C4 Complement Levels 
Explanation: Low C4 Complement levels suggest the development of lymphoma.