This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: TB of the Spine, Subject name: Orthopaedics
A 35-year-old lady with chronic backache. On X-ray she had a D12 collapse. But intervertebral disk space is maintained. All are possible except: 
Select and explain. 
A. Multiple myeloma, B. Osteoporosis, C. Metastasis, D. Tuberculosis
D: Tuberculosis
Answer: D: Tuberculosis 
Explanation: (d)- Characteristic radiological feature of Pott's spine is obliteration of disk space with destruction of two adjacent vertebrae.- This feature differentiate TB spine from other diseases causing vertebral destruction (like metastasis) in which disk space is preserved.