**Core Concept**
The question is testing the recognition of a rare genetic disorder characterized by distinctive physical features and cardiac conduction abnormalities. This condition is caused by a mutation in a specific gene that affects the development and function of the heart and other organs.

**Why the Correct Answer is Right**
The correct answer is Fabry disease, a rare X-linked lysosomal storage disorder caused by a deficiency of the enzyme alpha-Gal A. This enzyme is responsible for breaking down globotriaosylceramide (Gb3), a complex lipid that accumulates in cells and tissues, leading to the characteristic coarse facies, hepatosplenomegaly, and tall QRS complex on ECG. The tall QRS complex is due to the accumulation of Gb3 in the cardiac conduction system, leading to impaired electrical conduction and potentially life-threatening arrhythmias.

**Why Each Wrong Option is Incorrect**
**Option A:** is incorrect because it does not match the characteristic features of Fabry disease. This option might be a distractor for another condition.
**Option B:** is incorrect because it is a different genetic disorder with distinct clinical features. It does not involve a deficiency of alpha-Gal A or accumulation of Gb3.
**Option C:** is incorrect because it is a different condition that affects the liver and spleen but does not cause the characteristic cardiac conduction abnormalities.

**Clinical Pearl / High-Yield Fact**
Fabry disease is a classic example of a lysosomal storage disorder, and its diagnosis often requires a combination of clinical features, laboratory tests, and genetic analysis. Recognizing the distinctive features of Fabry disease is crucial for timely diagnosis and management.

**Correct Answer:** D. Fabry disease.