This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial Infection of Skin, Subject name: Skin
Most common infecting organism responsible for boils on face is- 
Select and explain. 
A. Streptococcus, B. Staphylococcus, C. Pseudomonas, D. None of the above
B: Staphylococcus
Answer: B: Staphylococcus 
Explanation: Ans is 'b' i.e. Staphylococcus * Boils anywhere in the body are most commonly caused by staphylococcus.Common bacterial infection of skin (pyoderma)1) By staphylococcus aureus - Bullous impetigo, impetigo contagiosa, Ecthyma, Supetficial and deep folliculitis (boils), Furuncle, Carbuncle.2) By streptococcus pyogenes - Impetigo contagiosa, Ecthyma, Erysipelas, Cellulitis.* Impetigo contagiosa, and ecthyma are caused by both staphylococci and streptococci.