Which of the following is an aldehyde of vitamin A present at photoreceptor cells of eye?

Retinal is a critical component found in the photoreceptor cells of the eye, specifically within the retina, the light-sensitive layer at the back of the eye responsible for converting light into electrical signals that are sent to the brain for visual processing. Retinal is a derivative or aldehyde of vitamin A, which is a fat-soluble vitamin essential for various biological processes, including vision.