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: Surgery
The most impoant single special investigation in lumbar disc prolapse is 
Select and explain. 
A. Epidurography, B. Myelography, C. MRI, D. Discography
C: MRI
Answer: C: MRI 
Explanation: C i.e. MRI