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
"Hypopyon sign" is seen in 
Select and explain. 
A. Impetigo contagiosa, B. Bullous impetigo, C. Ecthyma gangreonosum, D. Botryomycosis
B: Bullous impetigo
Answer: B: Bullous impetigo 
Explanation: Bullous impetigo is caused by Staphylococcus.aureus characterized by skin blisters.
Pus in the skin blisters settle down and this is called as "Hypopyon sign"