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
Most common organism responsible for gas gangrene is: 
Select and explain. 
A. Clostridium perfringens, B. Clostridium difficile, C. Clostridium tetani, D. Clostridium botulism
A: Clostridium perfringens
Answer: A: Clostridium perfringens 
Explanation: MC cause of gas gangrene is Cl. perfringens type A.