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
Rose waaler test is? 
Select and explain. 
A. Passive agglutination for rheumatoid ahiritis, B. Active agglutination for rheumatoid ahiritis, C. Passive agglutination for rheumatic fever, D. Active agglutination for rheumatic fever
A: Passive agglutination for rheumatoid ahiritis
Answer: A: Passive agglutination for rheumatoid ahiritis 
Explanation: 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