This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Lipid peroxidation of polyunsaturated lipids of subcellular membranes produces - \nSelect and explain. \nA. Hemosiderin, B. Lipofuscin, C. Both of above, D. None of above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lipofuscin is an insoluble pigment, also know n as lipochrome or wear-and-tear pigment.\nLipofuscin is composed of polymers of lipids and phospholipids in complex with protein, suggesting that it is derived through lipid peroxidation\xa0of polyunsaturated lipids of subcellular membranes.\nLipofuscin is not injurious to the cell or its functions.\nIts importance lies in its being a telltale sign of free radical injury and lipid peroxidation.\nThe term is derived from the Latin\xa0(fuscus, brown), referring to brown lipid. In tissue\xa0sections,\xa0it appears\xa0as a yellow-brown, finely granular cytoplasmic, often perinuclear, pigment.', 'role': 'assistant'}]