<prompt> The proxidant action of Vitamin C is potentiated by:SeleniumCopperCalciumIron  <response>: Ans. B. CopperRef: Harper 31e page 533-540Ascorbate is antioxidant, but it can be a source of hydroxyl radical by reacting with Cu2 ions. Antioxidant vitamins that can act as prooxidants are:Beta caroteneAscorbateTocopherol 