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 is \nSelect and explain. \nA. Gas embolism, B. Fat embolism, C. Amniotic fluid embolism, D. Tumor embolism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sudden decompression of the diver after excess\xa0exposure to high pressure: Decompression sickness\xa0(synonyms: Bends, Compressed Air Sickness, Caisson\xa0Disease, Diver’s Paralysis, Dysbarism):\n\nNitrogen bubbles can develop in the body fluids and can cause minor or serious damage in almost any area of the\xa0body (because nitrogen is not metabolized by the body).\nGas bubbles blocking many blood vessels in different\xa0tissues cause the symptoms of decompression sickness.\nMost common symptoms (85-90%): Pain in the joints and\xa0muscles of the legs and arms. The joint pain accounts for\xa0the term "bends".\nNervous system symptoms (5-10%): Dizziness, paralysis\xa0or collapse and unconsciousness.\nThe chokes (2%): Massive numbers of microbubbles\xa0plugging the capillaries of the lungs leading to shortness\xa0of breath, often followed by severe pulmonary edema\xa0and,\xa0occasionally death.', 'role': 'assistant'}]