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: Gynaecology & Obstetrics
Acute puerperal mastitis. Most common organism is 
Select and explain. 
A. Staphylococcus aureus, B. Streptococcus pyogenes, C. Streptococcus pneumonia, D. None
A: Staphylococcus aureus
Answer: A: Staphylococcus aureus 
Explanation: Staphylococcus aureus