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: Anaesthesia
[{'content': 'Hyperbaric oxygen is not useful in? \nSelect and explain. \nA. Anemia, B. Veigo, C. Gas gangrene, D. Compament Syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Veigo", 'role': 'assistant'}]