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: Physiology
[{'content': 'Which of the following cell organelle is rich in catalases? \nSelect and explain. \nA. Mitochondria, B. Ribosome, C. Peroxisome, D. Cell membrane', 'role': 'user'}, {'content': "Answer: C \nExplanation: Peroxisomes are 0.5 m in diameter, are surrounded by a membrane, and contain enzymes that can either produce H2O2 (oxidases) or break it down (catalases). Ref: Ganong's Review of Medical Physiology 23rd edition, Chapter 2.", 'role': 'assistant'}]