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': "A 60-year-old alcoholic male presented with urinary incontinence and abnormal gait since 3 months. He also complains of loss of memory. What is the diagnosis? \nSelect and explain. \nA. Huntington's disease, B. Normal pressure hydrocephalus, C. Wernicke's encephalopathy, D. Cynocobalamine deficiency", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]