**Core Concept**
Wolman's disease is a rare genetic disorder caused by a deficiency of the enzyme lysosomal acid lipase (LAL), leading to the accumulation of lipids in various organs, including the liver, spleen, and adrenal glands. This results in hepatosplenomegaly, liver dysfunction, and adrenal calcification.

**Why the Correct Answer is Right**
Wolman's disease is characterized by the early onset of symptoms, typically within the first few months of life. The accumulation of lipids in the adrenal glands leads to calcification, which is a hallmark of this disease. The deficiency of LAL enzyme results in the inability to break down lipids, leading to their accumulation and subsequent organ dysfunction. The combination of hepatosplenomegaly, abdominal distension, jaundice, anemia, and adrenal calcification is a classic presentation of Wolman's disease.

**Why Each Wrong Option is Incorrect**
**Option A:** Adrenal hemorrhage is a condition that typically presents with acute abdominal pain, hypotension, and adrenal insufficiency, which is not consistent with the chronic presentation of Wolman's disease.

**Option C:** Pheochromocytoma is a rare tumor of the adrenal gland that typically presents with hypertension, tachycardia, and sweating due to excessive catecholamine production. It does not typically cause hepatosplenomegaly or adrenal calcification.

**Option D:** Addison's disease is a condition caused by adrenal insufficiency, typically due to autoimmune destruction of the adrenal glands. While it can cause adrenal calcification, it does not typically present with hepatosplenomegaly, abdominal distension, or jaundice.

**Clinical Pearl / High-Yield Fact**
Wolman's disease is a rare but critical diagnosis to consider in infants with hepatosplenomegaly and adrenal calcification. Early recognition and diagnosis are essential to prevent further organ damage and to manage the disease effectively.

**✓ Correct Answer: B. Wolman's disease**