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
Triad of normal pressure hydrocephalus does not include: 
Select and explain. 
A. Ataxia, B. Aphasia, C. Dementia, D. Urinary incontinence
B: Aphasia
Answer: B: Aphasia 
Explanation: Ans. B. AphasiaTriad of NPH does not include aphasia.* The clinical triad of NPH includes- An abnormal gait (ataxic or apractic)- Dementia (usually mild to moderate, with an emphasis on executive impairment)- Urinary urgency or incontinence* Neuroimaging reveals enlarged lateral ventricles (hydrocephalus) with little or no cortical atrophy, although the sylvian fissures may appear propped open (so-called "boxcarring"), which can be mistaken for Peri sylvian atrophy.