**Core Concept**
Vitamin A deficiency can lead to xerophthalmia, a condition characterized by dryness of the conjunctiva and cornea, potentially resulting in corneal ulcers and permanent vision loss. In severe cases, vitamin A deficiency can cause corneal xerosis, which may progress to corneal ulceration and even corneal perforation.

**Why the Correct Answer is Right**
In the case of proven vitamin A deficiency with corneal clouding, the treatment of choice is vitamin A supplementation. This is because vitamin A is essential for maintaining the integrity of the cornea and the conjunctiva. Vitamin A deficiency impairs the synthesis of rhodopsin, a protein necessary for the regeneration of visual pigments in the retina, leading to night blindness and eventually, corneal damage. Administering vitamin A helps to replenish the stores of this essential nutrient, promoting healing and preventing further complications.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not address the underlying cause of the corneal clouding, which is vitamin A deficiency. Administering other supplements or medications may not be effective in treating the condition.
**Option B:** This option is incorrect because it is not a treatment for vitamin A deficiency-related corneal clouding. Antibiotics may be necessary if there is an associated infection, but they do not address the underlying deficiency.

**Clinical Pearl / High-Yield Fact**
It's essential to note that vitamin A deficiency can be prevented through dietary supplementation, and early detection and treatment can prevent severe complications. In cases of proven vitamin A deficiency, prompt administration of vitamin A can reverse the corneal changes and prevent permanent vision loss.

**Correct Answer: B. Vitamin A supplementation**