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
All are associated with Wernicke's encephalopathy,except - 
Select and explain. 
A. Cog-wheel rigidity, B. Alteration in mental function, C. VIth nerve palsy, D. Ataxia
A: Cog-wheel rigidity
Answer: A: Cog-wheel rigidity 
Explanation: None