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
Following clostridia are saccharolytic except - 
Select and explain. 
A. Welchii, B. Sporogenes, C. Septicum, D. Oedematiens
B: Sporogenes
Answer: B: Sporogenes 
Explanation: None