This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
[{'content': 'Which of the following pigments are involved in free radical injury? \nSelect and explain. \nA. Lipofuscin, B. Melanin, C. Bilirubin, D. Hematin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In aging or debilitating diseases the phospholipid end-products of membrane damage mediated by oxygen free radicals to get eliminated by intracellular lipid peroxidation. These, therefore, persist as collections of indigestible material in the lysosomes; thus lipofuscin is an example of residual bodies. Ref: Textbook of Pathology HARSH MOHAN 7th Edition page no.25', 'role': 'assistant'}]