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': 'Streptococcal GN is best diagnosed by - \nSelect and explain. \nA. ASO titre, B. AntiDNAse, C. Antihyaluronidase, D. Culture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. is \'b\' i.e., AntiDNAse; \'c\' Antihyaluronidase . "Antistreptolysin - 0 (ASO), anti DNAase B, antihyaluronidase, anti-NADase are elevated in more than 95% cases of PSGN (Post streptococcal glomerulonephritis) secondary to Pharyngitis". - API . Anti DNAase B and antihyaluronidase are elevated in more than 85% cases of PSGN following skin infection". - API . So PSGN can be diagnosed by anti DNAase B and antihyaluronidase because these antibodies are elevated after skin infection as well as after pharyngitis, while ASO is not elevated after skin infection.', 'role': 'assistant'}]