<prompt> Vitamers represent:Chemically similar substances that possess qualitatively similar vitamin activityChemically dissimilar substances that possess qualitatively similar vitamin activityChemically similar substances that possess qualitatively less vitamin activityChemically similar substances that possess qualitatively more vitamin activity  <response>: Vitamers:The term vitamers represents the chemically similar substances that possess qualitatively similar vitamin activity. Some good examples of vitamers are given below:Retinol, retinal and retinoic acid are vitamers of vitamin A.Pyridoxine, pyridoxal and pyridoxamine are vitamers of vitamin B6.Ref : Textbook of Biochemistry, Satyanarayana 