**Core Concept**
Hemochromatosis is a genetic disorder characterized by excessive iron absorption, leading to iron overload and subsequent organ damage. The condition is caused by mutations in the HFE gene, which regulates iron metabolism.

**Why the Correct Answer is Right**
Hemochromatosis primarily affects organs that are sensitive to iron toxicity, particularly the liver, pancreas, heart, and joints. The liver is the most commonly affected organ, where excessive iron deposition can lead to cirrhosis, fibrosis, and liver failure. The pancreas is also affected, resulting in diabetes mellitus due to beta-cell destruction. Cardiac involvement can lead to cardiomyopathy and heart failure, while joint involvement can cause arthritis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incomplete, but assuming a distractor is provided, it would be incorrect because hemochromatosis does not primarily affect the skin, although skin pigmentation changes can occur due to iron deposition.
* **Option B:** This option is also incomplete, but assuming a distractor is provided, it would be incorrect because hemochromatosis does not primarily affect the lungs, although respiratory symptoms can occur due to liver dysfunction.
* **Option C:** This option is incomplete, but assuming a distractor is provided, it would be incorrect because hemochromatosis does not primarily affect the kidneys, although renal impairment can occur due to iron overload.

**Clinical Pearl / High-Yield Fact**
The classic triad of hemochromatosis includes skin pigmentation changes, diabetes mellitus, and arthropathy. Early diagnosis and phlebotomy can prevent organ damage and improve outcomes.

**Correct Answer:** A. Liver, pancreas, heart, and joints.