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
[{'content': "All are feature of Wernicke's encephalopathy, Except: \nSelect and explain. \nA. Cogwheel rigidity, B. Alteration in mental function, C. Ophthalmoplegia, D. Ataxia", 'role': 'user'}, {'content': "Answer: A \nExplanation: 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", 'role': 'assistant'}]