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
Following are true of erysipelas except 
Select and explain. 
A. Streptococcal infection, B. Contagious and infectious, C. Margins are raised, D. All
B: Contagious and infectious
Answer: B: Contagious and infectious 
Explanation: Ans. is 'b' i.e. Contagious and infectious