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': 'A 60 year old man admitted with a pathological fracture on examination he was found to be anemic, laboratory examination showed ESR: 100mm/hr, X-ray - multiple lytic lesions. Peripheral smear showed increased rouleaux formation of the red cells and thrombocytopenia. Bone marrow examination confirmed the diagnosis \nSelect and explain. \nA. CML, B. Vitamin D deficiency, C. Multiple myeloma, D. Diffuse large B Cell Lymphoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Above clinical features are charateristic of multiple mycloma.', 'role': 'assistant'}]