Which of the following tests is used to detect the presence of antibodies against human leukocyte antigens (HLA) in a patient's serum?

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

Explanation

The lymphocytotoxicity assay is a test used to detect the presence of antibodies against HLA in a patient's serum, which is important in transfusion medicine and organ transplantation.

Source

Immunohematology textbook
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Medium MEDICAL Confidence: high