Question

question 21
which test is used to identify antigens on red blood cells for blood typing?
a agglutination
b elisa
c microarrays
d western blot
e precipitation

Explanation:

Blood typing identifies antigens (A/B) on red blood cells using agglutination. When specific antibodies (anti-A/anti-B) mix with matching antigens, red blood cells clump (agglutinate), indicating the blood type. ELISA, microarrays, Western blot, and precipitation are not standard for this purpose.

Answer:

A. Agglutination