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: Radiology
Most serious complication of myelogram is 
Select and explain. 
A. Allergy, B. Transient neurological deficit, C. Headache, D. Arachnoiditis
D: Arachnoiditis
Answer: D: Arachnoiditis 
Explanation: Ans. Arachnoiditis