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': 'Paradoxical respiration seen in \nSelect and explain. \nA. Diaphragm rupture, B. Hemoperitoneum, C. Flail chest, D. Pneumothorax', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer- C. Flail chest', 'role': 'assistant'}]