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
Which is a feature of Normal pressure hydrocephalus 
Select and explain. 
A. Gait Disturbance, B. Aphasia, C. Global confusion, D. Opthalmoplegia
A: Gait Disturbance
Answer: A: Gait Disturbance 
Explanation: Harrison's principles of internal medicine 17 th edition * For NPH the clinical triad includes an abnormal gait( ataxic/ apractic) , dementia and urinary incontinence .