The function of vitamin A is/are related to which of the following ?
Correct answer: D. All of the above
- A. Retinol
- B. Retinal
- C. Retinoic acid
- D. All of the above
Explanation
Vitamin A activity is distributed among its main forms: retinol supports transport and storage, retinal participates in vision, and retinoic acid regulates gene expression and epithelial differentiation. Therefore all three forms contribute to vitamin A functions.
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