This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacillus, Subject name: Microbiology
Medusa head colonies are seen in 
Select and explain. 
A. Bacillus anthracis, B. Bacillus cereus, C. C. parvum, D. C. difficile
A: Bacillus anthracis
Answer: A: Bacillus anthracis 
Explanation: Ans. (a) Bacillus anthracis