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: Skin
Bullous impetigo is caused by: March 2013 
Select and explain. 
A. Staphylococcus aureus, B. Pseudomonas, C. Haemophilus influenzae, D. Clostridium perfringenes
A: Staphylococcus aureus
Answer: A: Staphylococcus aureus 
Explanation: Ans. A i.e. Staphylococcus aureus Conditions caused by Staphylococcal aureus SSSS (Staphylococcal scalded skin syndrome), Bullous impetigo/Impetigo contagiosa, Furuncles/ Boils, Sycosis barbae and Sycosis nuchae