<prompt> Highly specific and sensitive test for diagnosing kalaazar: March 2010Complement fixation test with WKK antigenNapiers aldehyde testChopras antimony testImmunofluorescent antibody test  <response>: Ans. D: Immunofluorescent antibody test The direct agglutination test Immunofluorescent antibody test for anti-leishmanial antibody has been found to be highly specific and sensitive for diagnosing kal-azar. Complement fixation test with WKK antigen, Napiers aldehyde test and Chopras antimony test is also positive in some other conditions like TB and leprosy 