Which of the following structures represents Vitamin A?

Step-by-step solution

Vitamin A, also known as retinol, is a fat-soluble vitamin. Its chemical structure consists of a -ionone ring (a cyclohexene ring with three methyl groups) attached to a conjugated polyene side chain that terminates in a primary alcohol group ( -CH₂OH ). Analyzing the given options: Option (A) represents Adenine, a purine nucleobase. Option (B) represents Retinol, which is Vitamin A. Option (C) represents Nicotinamide, a form of Vitamin B3. Option (D) represents Ascorbic acid, which is Vitamin C. Thus, the structur