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
[{'content': "Not true regarding Waldenstrom's macroglobulinemia is - \nSelect and explain. \nA. Lymphadenopathy is usually present, B. Blood viscosity increased, C. IgM immunoglobulin increased, D. Hypercalcemia", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]