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: Forensic Medicine
[{'content': "All are associated with Wernicke's encephalopathy, except: FMGE 10; NEET 13; NIMHANS 13; UPSC 14 \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. Cog wheel rigidity', 'role': 'assistant'}]