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
Best treatment to prevent gas gangrene - 
Select and explain. 
A. Thorough debridement, B. Anti serum, C. Vaccnation, D. Antibiotics
A: Thorough debridement
Answer: A: Thorough debridement 
Explanation: None