This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Medicine
Charcot's joint seen in A/E - 
Select and explain. 
A. Syringomyelia, B. Diabetes, C. Hydrocephalus, D. Arnold-chiari malformation
A: Syringomyelia
Answer: A: Syringomyelia 
Explanation: Ref Harrisons 20e p2642