<prompt> Rose-Waaler test is a?Co-agglutination testLatex agglutination testSlide agglutination testHaemagglutination test  <response>: Rose-Waaler test is a passive haemagglutination test. It is done in rheumatoid ahritis. Autoantibody RA factor in the serum acts as antibody to gamma globulin. RA factor can agglutinate red cells coated with globulins. 