**Core Concept**
Wilson's disease, also known as hepatolenticular degeneration, is a rare genetic disorder characterized by excessive accumulation of copper in the body, particularly in the liver, brain, and other vital organs. This copper accumulation leads to damage in these organs, resulting in various clinical manifestations, including neurological symptoms.

**Why the Correct Answer is Right**
Neurological manifestations of Wilson's disease are due to copper accumulation in the brain, leading to damage in the basal ganglia, cerebellum, and other areas. This damage can cause a range of symptoms, including tremors, rigidity, dystonia, and movement disorders. The accumulation of copper also disrupts the normal functioning of neurotransmitters, leading to psychiatric symptoms such as depression, anxiety, and personality changes.

**Why Each Wrong Option is Incorrect**
* **Option A:** Tremors and rigidity are indeed neurological manifestations of Wilson's disease, making this option incorrect.
* **Option B:** Dystonia is a common neurological symptom of Wilson's disease, so this option is also incorrect.
* **Option C:** This option lists a symptom that is not typically associated with Wilson's disease, making it the correct answer.

**Clinical Pearl / High-Yield Fact**
Wilson's disease can be diagnosed using a combination of clinical features, laboratory tests, and imaging studies. A 24-hour urine copper test can help diagnose the disease, while a liver biopsy can confirm the presence of copper accumulation.

**Correct Answer: C.**