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 delayed complication of fracture \nSelect and explain. \nA. Osteoarthritis, B. Joint stiffness, C. Avascular Necrosis, D. Hypovolemic shock', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hypovolemic shock is an immediate complication of fractures.', 'role': 'assistant'}]