This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
Capsule of Bacillus Anthracis is stained by - 
Select and explain. 
A. Gram stained, B. PAS, C. Methylene blue, D. Calcoflour white
C: Methylene blue
Answer: C: Methylene blue 
Explanation: Ans. is 'c' i.e., Methylene blue * When blood films containing anthrax bacilli are stained with polychrome methylene blue for a few seconds and examined under microscope, an amorphous purplish material is noticed around bacilli. This represents the capsular material and is characteristic of the anthrax bacillus.