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
Anthrax bacilli differs from anthracoid bacilli by being - 
Select and explain. 
A. Non-capsulated, B. Strict aerobe, C. Non-motile, D. Haemolytic colonies on blood agar
C: Non-motile
Answer: C: Non-motile 
Explanation: Anthrax bacillus is capsulated, nonmotile and produce nonhemolytic colony on blood agar.
Both Anthrax bacilli and Anthracoid bacilli are strict aerobe.

Ref: Apurba Sastry’s Essentials of Medical Microbiology 1/e p254, Ananthanarayan 9/e p249