Answer: d. retinalogic
Explanation: retinalogic is not a form Vitamin A.
Retinoic acid is concern with the mediation of the functions of Vitamin A for the growth and development of the muscle, it is a metabolite of vitamin A.
Retinol is used as a component in dietary supplements. Retinol which also known as Vitamin A is a vitamin found in food and it serves as a dietary supplement to treat and prevent vitamin A deficiency.
Retinal is a molecule important for our vision which is also form of vitamin A. It was formerly called retinene. Retinal is the chemical basis of animal vision.
With these explanations, "retinalogic" is the odd in the group and is not a form of Vitamin A.