<prompt> Fenton reaction leads to free radical generation when -Radiant energy is absorbed by waterH202 is formed by myeloperoxidaseFerrous ion converted to ferric ionNitric oxide is converted to peroxynitrite  <response>: Ans. is c i.e., Ferrous ions converted to ferric ions o Free radicals are generated through Fentons reaction.o In this reaction iron is converted from its ferrous to ferric form and a free radical is generated,o The effect of these reactive species relevant to cells injury include;Lipid peroxidation of membranesOxidative modification of proteins and lesions in DMA. 