This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal infections, Subject name: Orthopaedics
[{'content': 'A 35 yr old lady with chronic backache. On X-ray she had a D12 collapse. But Interveebral disc space is maintained. All are possible except - \nSelect and explain. \nA. Multiple myeloma, B. Osteoporosis, C. Metastasis, D. Tuberculosis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: REF : MAHESWARI 9TH ED', 'role': 'assistant'}]