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': 'Fat embolism is characterized by: \nSelect and explain. \nA. Petecheal haemorrhages, B. Closed fractures of femur, C. Aggregation of chylomicrons, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A i.e. Petecheal haemorrhages; B i.e. Closed fractures of femur, C i.e. Aggregation of chylomicrons', 'role': 'assistant'}]