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: Orthopaedics
[{'content': 'Not a feature of fat embolism \nSelect and explain. \nA. Tachycardia, B. Hypotension, C. Petechial Rashes, D. Tachypnoea', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]