**Core Concept**
Normal pressure hydrocephalus (NPH) is a clinical syndrome characterized by the **triad of gait disturbance, dementia, and urinary incontinence**. It is associated with **enlarged ventricles** and normal cerebrospinal fluid (CSF) pressure. The underlying pathophysiology involves **impaired CSF absorption**.

**Why the Correct Answer is Right**
The correct answer is not provided, however, in NPH, gait disturbance is typically the first symptom, followed by dementia and urinary incontinence. The **gait disturbance** is often described as **magnetic gait**, where the feet appear to be stuck to the floor.

**Why Each Wrong Option is Incorrect**
**Option A:** Not provided, however, each option would be incorrect based on the typical symptoms of NPH.
**Option B:** Not provided.
**Option C:** Not provided.
**Option D:** Not provided.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that NPH can be diagnosed based on the presence of the **classic triad of symptoms** and **enlarged ventricles** on imaging, with a characteristic **magnetic gait**.

**Correct Answer:** Not provided, however an example would be: **Correct Answer: D. Headache.**