This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
True about the bacterial capsule is following except - 
Select and explain. 
A. Prevents phagocytosis, B. Stains by Gram stain, C. Protects bacteria from enzymes, D. Lost by repeated subcultures
B: Stains by Gram stain
Answer: B: Stains by Gram stain 
Explanation: Slime has a little affinity for basic dyes and is not visible in gram stained smears . Special capsule staining techniques are available usually employing copper salts as mordants. Capsules may be readily demonstrated by negative staining in wet films with India ink when they are seen as clear halos around the bacteria against a black ink Ref :Ananthanarayan & paniker's Textbook of microbioagainsth edition pg no 18