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
All are non-sporing anaerobes of medical impoance except 
Select and explain. 
A. Actinomyces, B. Bacteroides, C. Clostridia, D. Fusobacterium
C: Clostridia
Answer: C: Clostridia 
Explanation: Ans. is 'c' i.e., Clostridia