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 feature of Wernicke's encephalopathy, Except: 
Select and explain. 
A. Cogwheel rigidity, B. Alteration in mental function, C. Ophthalmoplegia, D. Ataxia
A: Cogwheel rigidity
Answer: A: Cogwheel rigidity 
Explanation: Answer is A (Cogwheel rigidity): Wernicke's disease is seen in AlcoholicQ patients with chronic thiamine deficiencyQ. The characteristic clinical triad is that of : Global confusion Ophthalmoplegia Ataxia