This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Anatomy
[{'content': 'NOT true about ASO titre: \nSelect and explain. \nA. May be positive in normal people, B. Major jones criteria, C. May be negative in post strptococcal glomerulonephritis, D. May not be elevated even in presence of carditis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ASO titre may be positive due to streptococcal infection even in normal people.in some individuals with rheutamatic carditis ASO titre may not be elevated. In PSGN the titre of anti DNA se B antibody is elevated more commonly than ASLO. (ref Robbins 9/e559,8th/566)', 'role': 'assistant'}]