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: Microbiology
[{'content': 'Anti-DNase B is used for the diagnosis of \nSelect and explain. \nA. Staphylococcus, B. Streptococcus, C. Corynebacterium, D. Neisseria', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Antideoxyribonuclease B ( anti-DNase\xa0B): serological test to determine streptococcal infection. Titres higher than 300 are taken as significant. Anti-DNase B and antihyaluronidase test are very useful for retrospective diagnosis of streptococcal pyoderma for which ASO is of much less value.', 'role': 'assistant'}]