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
The organism causing destruction of skin grafts is ? 
Select and explain. 
A. Streptococcus, B. Staphylococcus, C. Pseudomonas, D. Clostridium
A: Streptococcus
Answer: A: Streptococcus 
Explanation: Ans. is 'a' i.e., Streptococcus