This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'True statement about Antistreptolysin &;O&; titre is \nSelect and explain. \nA. In normal people the titre is <200, B. In acute glomerunephritis the titre is low, C. ASO titre >200 indicate rheumatic fever, D. Streptozyme test is an active haemagglutination test', 'role': 'user'}, {'content': "Answer: B \nExplanation: In Rheumatic fever and glomerulonephritis, a retrospective diagnosis of streptococcal infection may be established by demonstrating high levels of antibody to streptococcal toxins. The standard test in antistreptolysin O titration. High levels are usually found in acute rheumatic fever but in glomerulonephritis, titers are often low. Reference: Textbook of Microbiology; Anathanarayan and paniker's; 10th edition; Page no: 218", 'role': 'assistant'}]