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
[{'content': 'True about Bacterial capsule is following except \nSelect and explain. \nA. Prevents Phagocytosis, B. Stains by gram stain, C. Protects bacteria from lytic enzymes, D. Lost by repeated subcultures', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]