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
Hyperbaric oxygen is not useful in? 
Select and explain. 
A. Anemia, B. Veigo, C. Gas gangrene, D. Compament Syndrome
B: Veigo
Answer: B: Veigo 
Explanation: Ans. is 'b' i.e., Veigo