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
Spore rorming anaerobic gram positive bacilli 
Select and explain. 
A. Bacillus Anthracis, B. Clostridia, C. Corynebacterium, D. Peptostreptococcus
B: Clostridia
Answer: B: Clostridia 
Explanation: Ans. is. 'b' i. e. Clostridia