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: Surgery
Gas' in the tissue should be differenciated with - 
Select and explain. 
A. Pseudomyxoma peritonei, B. Pseudomonas infection, C. Clostridium nouyi, D. Non clostridial infection
C: Clostridium nouyi
Answer: C: Clostridium nouyi 
Explanation: None