Answer:
The correct answer is option D.
Explanation:
Vitamin A is one of the vitamins that are essential for the body and play different roles in the body such as vision, reproduction, bone health, and others. Vitamin A has present in three active states which are retinol, retinoic acid and retinal.
Retinal helps in vision and deficiency can cause night blindness, Retinal helps different functions in the body such as bone remodeling, reproductive biology, and epithelial tissue homeostasis.
Thus, the correct answer is option D.