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: Physiology
[{'content': 'Caisson’s disease \nSelect and explain. \nA. Gas Embolism, B. Fat embolism, C. Amniotic fluid embolism, D. Tumor embolism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]