**Cataract is seen in following except:**

**Core Concept**
Cataract refers to the opacification of the lens in the eye, leading to vision impairment. This condition can result from various factors, including metabolic disorders, genetic mutations, and prolonged exposure to UV radiation.

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiology of cataract formation. Cataracts are known to be associated with diabetes mellitus, caused by the advanced glycosylation end-products (AGEs) that accumulate in the lens, leading to oxidative stress and opacification. Similarly, corticosteroid use is linked to cataract development due to the harmful effects of prolonged steroid exposure on the lens. Furthermore, galactosemia, a genetic disorder affecting galactose metabolism, can lead to cataract formation in infants.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
It's essential to recognize that cataracts can be a manifestation of underlying systemic conditions, such as diabetes mellitus or galactosemia. A thorough medical history and physical examination can help identify these conditions and guide appropriate management.

**Correct Answer:** A.
Explanation: Since option A is not provided, we cannot accurately determine the correct answer.