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
Bence - Jones are laboratory finding of 
Select and explain. 
A. Paget's disease, B. Multiple myeloma, C. Malignant melanoma, D. Fibrous dysplasia
B: Multiple myeloma
Answer: B: Multiple myeloma 
Explanation: None