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
Spores are formed by all except: 
Select and explain. 
A. E. coli, B. B. anthrex, C. B. cerus, D. None
A: E. coli
Answer: A: E. coli 
Explanation: Ans. a. E. coli