This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Medicine
[{'content': 'All are associated with Wernicke, encephalopathy, EXCEPT: \nSelect and explain. \nA. Cog-wheel rigidity, B. Alteration in mental function, C. Vlth nerve palsy, D. Ataxia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' Cogwheel rigidity", 'role': 'assistant'}]