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': 'Which of the following is associated with aging ? \nSelect and explain. \nA. Reduced cross linkages in collagen, B. Increased free radical injury, C. Decreased Somatic mutations in DNA, D. Increased superoxide dismutase levels', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Increased free radical injuryFree radical (reactive oxygen species) mediated damage is one of the impoant factor that contribute to cellular aging. The rate at which antioxidant system (catalase, peroxidas and superoxide dismutase) is synthesized declines with cell aging.About other optionsCross linkages in collagen increases with cell aging.Somatic mutations increase with cell aging.", 'role': 'assistant'}]