**Core Concept:**
Winging of the scapula is a clinical sign observed when there is paralysis of the serratus anterior muscle. The serratus anterior muscle is a postero-lateral muscle of the chest wall, which is involved in elevating and laterally rotatating the scapula. This muscle arises from the ribs (8th to 10th) and inserts onto the inferior angle of the scapula.

**Why the Correct Answer is Right:**
The correct answer, **Option C: Serratus Anterior Muscle**, is right because it is responsible for elevating and laterally rotating the scapula, and its paralysis can result in winging of the scapula. In comparison, options A, B, and D do not cause winging of the scapula.

**Why Each Wrong Option is Incorrect:**

A. **Option A: Levator Scapulae Muscle (Levator scapulae) - This muscle is located on the posterior aspect of the neck and is responsible for elevating the scapula. Its paralysis does not result in winging of the scapula.**

B. **Option B: Trapezius Muscle - The trapezius muscle is involved in retracting the scapula and rotatating it downward. Paralysis of this muscle does not cause winging of the scapula.**

C. **Option C: Serratus Anterior Muscle - As explained above, this muscle is responsible for elevating and laterally rotating the scapula. Paralysis of serratus anterior leads to winging of the scapula.**

D. **Option D: Rhomboid Muscles - The rhomboids are involved in retracting the scapula and rotatating it inferiorly. Paralysis of these muscles does not cause winging of the scapula.**

**Clinical Pearl / High-Yield Fact:**
The winged scapula or scapular winging is a clinical sign indicating paralysis of the serratus anterior muscle. This sign can be seen in various conditions such as spinal cord injuries, myopathies, or trauma. It is essential for students of medicine and surgery to be familiar with this sign as it can provide clues regarding the underlying cause of paralysis of the serratus anterior muscle.