Which of the following tests is used to detect the presence of antibodies against red blood cell antigens in a patient's serum?

A Direct Coombs test
B Indirect Coombs test ✓
C Crossmatch test
D Blood typing test

Explanation

The indirect Coombs test, also known as the indirect antiglobulin test, is used to detect the presence of antibodies against red blood cell antigens in a patient's serum.

Source

Clinical Laboratory Hematology
Hematology Hematology: Blood Grouping and Crossmatching Hematology: Blood Grouping and Crossmatching Medium MEDICAL Confidence: high