**Core Concept**
Repetition of movements, acts, and words is a characteristic feature of a specific psychiatric disorder. This condition is often associated with a disconnection between the various parts of the brain responsible for coordinating and controlling voluntary movements. The repetition of movements, acts, and words can be a manifestation of this underlying neurobiological dysfunction.

**Why the Correct Answer is Right**
The correct answer is a classic symptom of **Huntington's Disease (HD)**. HD is an autosomal dominant neurodegenerative disorder caused by an expansion of CAG repeats in the Huntingtin gene. This genetic mutation leads to the degeneration of neurons in the basal ganglia, particularly the caudate nucleus and putamen. The degeneration of these neurons disrupts the normal functioning of the cortico-striatal-thalamo-cortical (CSTC) circuit, resulting in the characteristic motor symptoms of HD, including chorea (involuntary movements), dystonia (muscle contractions), and akathisia (restlessness). The repetition of movements, acts, and words is a manifestation of the basal ganglia dysfunction.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe the repetition of movements, acts, and words. While it may be a characteristic feature of other psychiatric disorders, it is not the primary symptom of **Huntington's Disease**.
* **Option B:** This option is incorrect because it is a symptom of **Obsessive-Compulsive Disorder (OCD)**, which involves repetitive thoughts and compulsions to perform specific rituals. While OCD can involve repetitive behaviors, it is not the same as the repetition of movements, acts, and words seen in HD.
* **Option C:** This option is incorrect because it is a symptom of **Dementia with Lewy Bodies (DLB)**, which involves cognitive decline, visual hallucinations, and parkinsonian motor symptoms. While DLB can involve repetition of movements, it is not the primary symptom of the disorder.

**Clinical Pearl / High-Yield Fact**
Huntington's Disease is characterized by a **triad of symptoms**: chorea (involuntary movements), cognitive decline, and psychiatric symptoms, including depression and anxiety. The disease typically presents in mid-life, with a mean age of onset around 40 years.

**Correct Answer: C. Huntington's Disease**