An Immunoassay Was Performed in the Following Way: Antigen Is

Multiple Choice

An immunoassay was performed in the following way: Antigen is bound to a solid support.Patient serum is added and patient antibodies bind to the antigen.The well is washed and enzyme-labeled anti-immunoglobulin antibodies are added.The well is washed and enzyme substrate is added and enzyme activity is determined.Which immunoassay is described?

A) sandwich
B) competitive
C) ELISA
D) homogeneous