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': 'true about fracture shaft femur in infant is: \nSelect and explain. \nA. Child abuse is commonest cause, B. Heals rapidly, C. Traction is all that usually required, D. Fat embolism is common', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Fat embolism is common', 'role': 'assistant'}]