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: Medicine
[{'content': 'Hyperbaric oxygen is used in - a) Co poisoning  b) ARDS  c) Anerobic infection  d) Septicemia  e) Pneumonia \nSelect and explain. \nA. ac, B. ad, C. ab, D. de', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]