This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'True about cell ageing \nSelect and explain. \nA. Free radical injury, B. Mitochondria are increased, C. Lipofuscin accumulation in cell, D. Size of the cell increase', 'role': 'user'}, {'content': 'Answer: C \nExplanation: ref Robbins 9/e p64', 'role': 'assistant'}]