## Core Concept
Duchenne muscular dystrophy (DMD) is a genetic disorder characterized by progressive muscle degeneration and weakness. It is caused by an absence of dystrophin, a protein that helps keep muscle cells intact. The disorder is X-linked recessive and primarily affects males.

## Why the Correct Answer is Right
The correct answer is related to the fact that Duchenne muscular dystrophy is caused by mutations in the dystrophin gene, leading to the absence of the dystrophin protein. This absence results in muscle cell damage and progressive muscle weakness. The disorder manifests in early childhood, with symptoms including delayed motor milestones, muscle weakness, and elevated serum creatine kinase levels.

## Why Each Wrong Option is Incorrect
- **Option A:** Not provided, as the actual statements for each option are missing.
- **Option B:** Not provided, as the actual statements for each option are missing.
- **Option C:** Not provided, as the actual statements for each option are missing.
- **Option D:** Not provided, as the actual statements for each option are missing.

## Clinical Pearl / High-Yield Fact
A key clinical pearl for Duchenne muscular dystrophy is that patients often exhibit a positive Gower's sign, which is a compensatory mechanism used to stand up from a prone position due to proximal muscle weakness. Another important fact is that corticosteroids are a mainstay of treatment to slow the progression of muscle weakness.

## Correct Answer: D. (Assuming D is the false statement about DMD)