Which of the following blood grouping tests is used to detect the presence of antibodies against high-frequency antigens?

A Indirect antiglobulin test ✓
B Direct antiglobulin test
C Enzyme-linked immunosorbent assay (ELISA)
D Polybrene test

Explanation

The indirect antiglobulin test is used to detect the presence of antibodies against high-frequency antigens, which are present on most red blood cells.

Source

Technical Manual of the American Association of Blood Banks
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Hard MEDICAL Confidence: medium