This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Which is a feature of Normal pressure hydrocephalus \nSelect and explain. \nA. Gait Disturbance, B. Aphasia, C. Global confusion, D. Opthalmoplegia', 'role': 'user'}, {'content': "Answer: A \nExplanation: Harrison's principles of internal medicine 17 th edition * For NPH the clinical triad includes an abnormal gait( ataxic/ apractic) , dementia and urinary incontinence .", 'role': 'assistant'}]