VMC-0057
QUESTION
Agglutination is a serological reaction in which?
OPTIONS
(A) Antigen is in soluble form
(B) Antibody is in particulate form
(C) Antigen is in particulate form
(D) Antibody is in soluble form
ANSWER
(C) Antigen is in particulate form
EXPLANATION
In an agglutination reaction, the antigen is particulate or becomes particulate through carrier particles, allowing antibody to cross-link the particles into visible clumps. Therefore option C is correct; soluble antigen-antibody reactions are classically described as precipitation rather than agglutination.