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': 'Axonemes are associated with: \nSelect and explain. \nA. Mitochondria, B. Ribosome, C. Peroxisome, D. Cilia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Within the cilium there is an axoneme that comprises a unique arrangement of nine outer microtubule doublets and two inner microtubules ("9+2" arrangement). Ref: Ganong\'s Review of Medical Physiology 23rd edition, Chapter 2.', 'role': 'assistant'}]