**Core Concept**
The underlying principle being tested is the understanding of iron metabolism and its disorders, particularly in the context of chronic alcoholism. **Hemochromatosis** is a condition characterized by excessive iron accumulation in the body, leading to tissue damage.

**Why the Correct Answer is Right**
Given the increased serum iron and transferrin saturation, the probable diagnosis is **Hemochromatosis**. This condition is often associated with chronic alcoholism due to increased iron absorption and liver disease, which can lead to an imbalance in iron metabolism. The **HFE gene** mutation is commonly responsible for hereditary hemochromatosis, but chronic alcoholism can also lead to secondary hemochromatosis.

**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not specified, but typically, other conditions like iron deficiency anemia would present with low serum iron.
**Option B:** Incorrect as it is not provided, but usually, conditions with decreased transferrin saturation would be considered.
**Option C:** Incorrect because it is unspecified, but generally, anemia of chronic disease would have decreased serum iron.
**Option D:** Incorrect as it is not given, but usually, other types of anemia would not present with increased transferrin saturation.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that **hemochromatosis** can lead to **cirrhosis**, **cardiomyopathy**, and **diabetes mellitus** due to iron deposition in the liver, heart, and pancreas. Early diagnosis and treatment can prevent these complications.

**Correct Answer:** D. Hemochromatosis.