## **Core Concept**
The question tests knowledge of **Friedreich's Ataxia**, a genetic disorder characterized by progressive damage to the nervous system and other bodily systems. This condition often presents with ataxia, sensory deficits, and various systemic manifestations.

## **Why the Correct Answer is Right**
Friedreich's Ataxia is an autosomal recessive disorder primarily affecting the nervous system and the heart. Key features include:
- **Progressive ataxia** due to degeneration of the cerebellum and its connections.
- **Extensor plantar response** (Babinski sign), indicating upper motor neuron involvement.
- **Position sense deficits**, reflecting damage to the dorsal columns of the spinal cord.
- **Systemic features** such as **cardiomyopathy**, **scoliosis**, **foot deformities**, and **optic atrophy** are commonly associated.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Not provided, assumed incorrect based on context.
- **Option B:** Not provided, assumed incorrect based on context.
- **Option C:** Not provided, assumed incorrect based on context.

## **Clinical Pearl / High-Yield Fact**
A crucial point to remember is that Friedreich's Ataxia often presents in childhood or adolescence but can have a later onset. A key diagnostic clue is the presence of **cardiomyopathy** alongside neurological symptoms, which is less common in other ataxias.

## **Correct Answer Line**
**Correct Answer: D. Friedreich's Ataxia.**