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
Not true regarding Waldenstrom's macroglobulinemia is - 
Select and explain. 
A. Lymphadenopathy is usually present, B. Blood viscosity increased, C. IgM immunoglobulin increased, D. Hypercalcemia
D: Hypercalcemia
Answer: D: Hypercalcemia 
Explanation: None