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
Hyperbaric oxygen is used in - a) Co poisoning  b) ARDS  c) Anerobic infection  d) Septicemia  e) Pneumonia 
Select and explain. 
A. ac, B. ad, C. ab, D. de
A: ac
Answer: A: ac 
Explanation: None