<prompt> Anti infective vitamin isVitamin B6Vitamin AVitamin DVitamin C  <response>: Functions of Vit AVitamin A is essential for -I.Normal visionRetinol is necessory for functioning of retina.Regeneration of rhodopsin during dark light is vit A dependent -- vit A deficiency causes defective dark adaptation.2. Anti-infectiveVitamin A is necessary for integrity of epithelial tissues that resist invasion by pathogens.Vitamin A has some role in immune response.3. Anticancer effectBeta-carotene has antioxidant property by virtue of this action it reduces the incidence of lung, breast, oral, esophageal and bladder cancers.4. Skeletal - growthVitamin A supports skeletal growth. 