Which of the Following Vitamins Function as Both a Visual Pigment as Well as a Hormone?

Which of the Following Vitamins Function as Both a Visual Pigment as Well as a Hormone?

Q. Which of the Following Vitamins Function as Both a Visual Pigment as Well as a Hormone?

A.            Thiamine

B.            Folic acid

C.            Riboflavin

D.            Retinal

Answer: Retinal

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