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: Pathology
Multiple myleoma is characterized by all except 
Select and explain. 
A. Presence of light chains, B. Monoclonal gammopathy, C. Polyclonal gammopathy, D. Hypergammaglobulinemia
C: Polyclonal gammopathy
Answer: C: Polyclonal gammopathy 
Explanation: None