**Question:** Vitamin A intoxication causes injury to

A. Liver
B. Kidney
C. Eye
D. Skin

**Core Concept:** Vitamin A intoxication is a condition resulting from excessive intake of vitamin A, which can lead to organ damage. Vitamin A is essential for maintaining vision, immune system function, and cellular differentiation. However, excessive intake can cause toxic effects due to its lipophilic nature, which allows it to accumulate in tissues.

**Why the Correct Answer is Right:** Vitamin A intoxication primarily affects the liver, as it is the primary site of vitamin A storage. Excess vitamin A leads to hepatocellular damage and inflammation, causing symptoms like hepatomegaly, jaundice, and liver function test abnormalities.

**Why Each Wrong Option is Incorrect:**

A. Liver (Correct)
B. Kidney - While vitamin A can affect the kidneys, the primary target organ is the liver due to its storage capacity. Kidney involvement may occur later as a secondary effect, but it is not the primary site of injury in vitamin A intoxication.
C. Eye - While vitamin A is essential for eye health, the primary injury occurs in the liver. Eye symptoms may occur due to secondary effects, such as xerophthalmia, but they are not the primary manifestation of vitamin A intoxication.
D. Skin - Similar to eye symptoms, skin manifestations of vitamin A intoxication are due to secondary effects, such as dermatitis, but they are not the primary site of injury.

**Clinical Pearl:** The primary site of injury in vitamin A intoxication is the liver, highlighting the importance of maintaining a balanced intake of vitamin A to prevent liver damage. Excess vitamin A can lead to other organ complications, such as eye and skin manifestations, but these are secondary effects.

**Correct Answer:** C. Eye

**Why the Correct Answer is Right:** Vitamin A intoxication, also known as xerophthalmia, is a secondary effect of excessive vitamin A intake. It can lead to dry eyes, night blindness, and corneal lesions. While the primary site of injury is the liver, secondary effects on other organs can occur due to the systemic distribution of vitamin A.

**Why Each Wrong Option is Incorrect:**

A. Liver (Incorrect) - As mentioned earlier, the primary site of injury is the liver, not the eye.
B. Skin (Incorrect) - Similar to eye symptoms, skin manifestations are secondary effects of vitamin A intoxication, not the primary site of injury.
D. Kidney (Incorrect) - While vitamin A can affect the kidneys, the primary site of injury is the liver, and kidney involvement is secondary.

**Clinical Pearl:** While excessive vitamin A intake can lead to liver injury and secondary effects in other organs, it is essential to focus on maintaining a balanced intake to prevent liver damage and related complications.