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
Bad prognosis in multiple myeloma is indicated by - 
Select and explain. 
A. WBC > 20000, B. Azotemia, C. Hypocalcemia, D. Low or normal M component production
B: Azotemia
Answer: B: Azotemia 
Explanation: None