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: Surgery
[{'content': 'Following are true of erysipelas except \nSelect and explain. \nA. Streptococcal infection, B. Contagious and infectious, C. Margins are raised, D. All', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Contagious and infectious", 'role': 'assistant'}]