Final answer:
The active forms of vitamin A are retinal, retinol, and retinoic acid. The option 'retinalogical' provided in the question is not a recognized form of vitamin A and is incorrect as an active form of this vitamin.
Step-by-step explanation:
The active forms of vitamin A are retinal, retinol, and retinoic acid. These forms serve various functions in the human body, including vision and cellular growth. Retinal, also known as vitamin A1, is the aldehydic form that plays a crucial role in the visual cycle. Retinol, which is the alcoholic form of vitamin A, can be converted into retinal and retinoic acid and is important for vision, reproduction, and maintaining healthy skin. Retinoic acid, the acid form, is involved in gene transcription and the growth of skin cells. Retinalogical is not a known form of vitamin A and, therefore, cannot be considered an active form of this vitamin.
Various sources of vitamin A are obtained through dietary means, such as conversion of β-carotenes (plant sources) to vitamin A and hydrolysis of retinyl esters (animal sources) in the intestine. Once in the body, vitamin A is absorbed and transported to various organs for utilization.