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: Medicine
In one of the following condition cavities filled with
fluid is seen in the centre of spinal cord: 
Select and explain. 
A. Multiple sclerois, B. Syringo myelia, C. Tabes Dorsalis, D. Meningovascular syphilis
B: Syringo myelia
Answer: B: Syringo myelia 
Explanation: None