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': 'Which of the following is true about fat embolism? \nSelect and explain. \nA. Usually ensues after fracture of the lower limb, B. Uncommon complication of fracture, C. Spontaneously reversible process, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Usually ensues', 'role': 'assistant'}]