This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pathogenesis, Subject name: Surgery
[{'content': 'Commonest cause of cellulitis is \nSelect and explain. \nA. Staphylococcus, B. Streptococcus, C. E. coli, D. Hemophilus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Streptococcus(Ref: Bailey 26th 55)* Most common cause of cellulitis is Streptococci. Other causes include Staphylococci, and C.Perfringens', 'role': 'assistant'}]