This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Alcohol-Related Disorders, Subject name: Psychiatry
[{'content': "Earliest symptom showing improvement from classical triad of Wernicke's incephalopathy, to thiamine therapy - \nSelect and explain. \nA. Ataxia, B. Ophthalmoplegia, C. Confusion, D. All are equally responsive", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Ophthalmoplegia Response to thiamine treatment in Wernicke's encephalopathyOcular symptoms :- Earliest to respond, ophthalmoplegia (ocular palsies) improves within hours of thiamine administration. However, horizontal nystagmus may persist.Ataxia :- Ataxia responds more slowly than ocular palsies and half the patients recover incompletely with a residual ataxia.Encephalopathy :- Confusion and other CNS symptoms improve more slowly. As the symptoms of encephalopathy improve, Korsakoff's syndrome may become apparent in some patients.", 'role': 'assistant'}]