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: Microbiology
All cause fournier gangrene except- 
Select and explain. 
A. Staphylococcus, B. Streptococcus, C. Clostridium, D. Bacteroides
C: Clostridium
Answer: C: Clostridium 
Explanation: None