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': '65 year old man who is anaemic, complaints of back\npain, multiple radiolucencies in panaromic view \nSelect and explain. \nA. Multiple myeloma, B. Osteosarcoma, C. Giant cell granuloma, D. Eosinophilic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]