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
Transverse myelitis usually presents 
Select and explain. 
A. 1 – 2 weeks, B. 1 – 2 months, C. 4 – 6 months, D. 1 year
D: 1 year
Answer: D: 1 year 
Explanation: Usual time of onset of symptoms of post-radiation transverse myelitis is 12-24 months but can occur as early as 6 months after radiation.