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: Anatomy
[{'content': 'Middle piece of sperm contains ? \nSelect and explain. \nA. Golgi apparatus, B. Mitochondria, C. Lysosome, D. Ribosome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Mitochondria", 'role': 'assistant'}]