Match the Chemiluminescent Format with the Appropriate Description

Match the chemiluminescent format with the appropriate description.
-Sandwich immunoassay

A) A fixed amount of labeled antigen competes with unlabeled antigen from a patient specimen for a limited number of antibody-binding sites.
B) The sample antigen binds to an antibody fixed onto a solid phase; a second antibody, labeled with a chemiluminescent label, binds to the antigen-antibody complex on the solid phase.
C) A fixed amount of labeled antibody competes with unlabeled antibody from a patient specimen for a limited number of antigen-binding sites.
D) The sample antibody binds to an antigen fixed onto a solid phase; a second antigen, labeled with a chemiluminescent label, binds to the antigen-antibody complex on the solid phase.