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': 'Triad of normal-pressure hydrocephalus includes - \nSelect and explain. \nA. Tremor, aphasia dementia, B. Ataxia, aphasia, gait disorder, C. Gait disorder, urinary incontinence, dementia, D. Gait disorder, urinary incontinence, lower cranial nerve palsy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]