This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clostridium, Subject name: Microbiology
Naegler's reaction is given by - 
Select and explain. 
A. Clostridium bifermentans, B. Cl perfringens, C. Cl sordelli, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is i.e., All of the above " Besides Cl perfringens, other bacteria that give a positive Nagler reaction are Cl bifermentans, Cl sordelli and Cl barati