**Core Concept**
The question is testing the diagnosis of a congenital condition characterized by hepatosplenomegaly, edema, and often death in early infancy. This condition is caused by a defect in the enzyme alpha-glucosidase, leading to the accumulation of glycogen in the lysosomes of cells, particularly in the liver and spleen.

**Why the Correct Answer is Right**
The correct diagnosis is Pompe disease, a glycogen storage disorder type II. In Pompe disease, the enzyme acid alpha-glucosidase (GAA) is deficient or mutated, leading to the accumulation of glycogen in the lysosomes of cells, particularly in the liver and spleen. This accumulation causes hepatosplenomegaly and leads to cellular dysfunction, resulting in the characteristic symptoms of the disease.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely a distractor and may refer to another glycogen storage disorder, such as type III (Cori's disease) or type IV (Andersen's disease). However, these conditions do not typically present with hepatosplenomegaly and edema in early infancy.

**Option B:** This option may refer to a congenital infection, such as congenital rubella syndrome or congenital CMV infection. However, these conditions do not typically present with hepatosplenomegaly and edema as primary features.

**Option C:** This option may refer to a congenital metabolic disorder, such as congenital adrenal hyperplasia. However, this condition does not typically present with hepatosplenomegaly and edema in early infancy.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that Pompe disease is a glycogen storage disorder type II, characterized by the deficiency of the enzyme acid alpha-glucosidase (GAA). Early diagnosis and treatment can improve outcomes, but prompt recognition of the condition is crucial.

**Correct Answer: D. Pompe disease**