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: Surgery
[{'content': 'Healing of of bone is affected by: \nSelect and explain. \nA. Micromovement, B. Muscle interposition, C. Hypoxia, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Micromovement; B i.e. Muscle interposition; C i.e. Hypoxia', 'role': 'assistant'}]