This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Rose waaler test is? \nSelect and explain. \nA. Passive agglutination for rheumatoid ahiritis, B. Active agglutination for rheumatoid ahiritis, C. Passive agglutination for rheumatic fever, D. Active agglutination for rheumatic fever', 'role': 'user'}, {'content': 'Answer: A \nExplanation: WAALER-ROSE Bicolor is a haemagglutination slide test for the rapid qualitative and semi-quantitative detection of IgM Rheumatoid Factor in sera from most patients with rheumatoid ahritis. Ref: Ananthanarayana & panikers 9th edition', 'role': 'assistant'}]