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: Psychiatry
Most reliable test for spinal tuberculosis 
Select and explain. 
A. Raised ESR, B. PPD skin test, C. CT guided biopsy, D. MRI
C: CT guided biopsy
Answer: C: CT guided biopsy 
Explanation: Ans. c. CT guided biopsy