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
Inveed fir tree appearance is characteristic ? 
Select and explain. 
A. Bacillus anthrax, B. Hemophilus influenzae, C. Yersinia pestis, D. Brucella
A: Bacillus anthrax
Answer: A: Bacillus anthrax 
Explanation: Ans. is 'a' i.e., Bacillus anthrax