This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
True about Bacterial capsule is following except 
Select and explain. 
A. Prevents Phagocytosis, B. Stains by gram stain, C. Protects bacteria from lytic enzymes, D. Lost by repeated subcultures
B: Stains by gram stain
Answer: B: Stains by gram stain 
Explanation: Gram staining differentiates bacteria by the chemical and physical propeies of their cell walls by detecting peptidoglycan, which is present in a thick layer in gram-positive bacteria. So gram stain is not a stain of capsule it is a stain of cell wall.