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: Dental
[{'content': '"Hypopyon sign" is seen in \nSelect and explain. \nA. Impetigo contagiosa, B. Bullous impetigo, C. Ecthyma gangreonosum, D. Botryomycosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Bullous impetigo is caused by Staphylococcus.aureus characterized by skin blisters.\nPus in the skin blisters settle down and this is called\xa0as "Hypopyon sign"', 'role': 'assistant'}]