Deficiency in which of the following vitamins is associated with progressive keratinization of the cornea?

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Vitamin A deficiency can lead to xerophthalmia, which includes symptoms like progressive keratinization of the cornea, potentially leading to blindness.  The earliest symptoms of vitamin A deficiency are night blindness. Additional early symptoms include follicular hyperkeratosis, increased susceptibility to infection and cancer, and anemia equivalent to iron deficiency anemia. Prolonged lack of vitamin A leads to deterioration of the eye tissue through progressive keratinization of the cornea, a condition known as xerophthalmia

Deficiency in Which of the Following Vitamins Is Associated with Progressive