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': 'Most common site of tuberculosis of spine is? \nSelect and explain. \nA. Thoracolumbar, B. Sacral, C. Cervical, D. Lumbosacral', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. (a) ThoracolumbarRef: Apley 387-389, Schwartz's Principles of Surgery 9th ed ch-29 M Tuli 3rded p-192", 'role': 'assistant'}]