This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mechanisms of Cell Injury, Subject name: Pathology
[{'content': 'Fenton reaction leads to free radical generation when - \nSelect and explain. \nA. Radiant energy is absorbed by water, B. H202 is formed by myeloperoxidase, C. Ferrous ion converted to ferric ion, D. Nitric oxide is converted to peroxynitrite', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Ferrous ions converted to ferric ions o Free radicals are generated through Fenton's 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.", 'role': 'assistant'}]