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': 'Bence Jones protein seen in patients with disease: \nSelect and explain. \nA. Leukemia., B. Polycythemia., C. Multiple myeloma., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]