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
True about cell ageing 
Select and explain. 
A. Free radical injury, B. Mitochondria are increased, C. Lipofuscin accumulation in cell, D. Size of the cell increase
C: Lipofuscin accumulation in cell
Answer: C: Lipofuscin accumulation in cell 
Explanation: ref Robbins 9/e p64