**Core Concept**
The question is testing knowledge of a specific disorder of carbohydrate metabolism that affects the heart. This condition is characterized by an accumulation of abnormal sugars in the body, leading to a range of systemic symptoms, including cardiac involvement.

**Why the Correct Answer is Right**
The correct answer is a disorder of glycogen metabolism, specifically **Hypokalemic Familial Periodic Paralysis (HFKPP)** or more commonly known as **Hypokalemic Periodic Paralysis (HPP)**. HPP is caused by mutations in the _CACNA1S_ or _SCN4A_ genes, leading to abnormalities in the sodium-potassium pump and subsequent glycogen breakdown. This results in recurrent episodes of muscle weakness and paralysis, including cardiac involvement, due to the abnormal accumulation of glycogen in cardiac muscle cells.

**Why Each Wrong Option is Incorrect**
* **Option A:** **Type 1 Diabetes Mellitus** is a disorder of carbohydrate metabolism, but it primarily affects the pancreas and is characterized by hyperglycemia, not cardiac involvement.
* **Option B:** **Glycogen Storage Disease Type III (GSD III)**, also known as Cori's disease, affects glycogen breakdown but is primarily associated with hepatic symptoms, not cardiac involvement.
* **Option C:** **Pompe Disease** is another glycogen storage disease, but it primarily affects muscle and nerve function, not the heart.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that glycogen storage diseases can present with a range of systemic symptoms, including cardiac involvement, and that the specific enzyme deficiencies can affect different organs to varying degrees.

**Correct Answer: C. Hypokalemic Periodic Paralysis (HPP)**