Answer:
B and D? or the second and fourth ones
Explanation:
idgis primarily found on the surface of B lymphocytes where it functions as a receptor for antigen.
img antibodies are found in blood and lymph fluid and are the first type of antibody made in response to an infection. They also cause other immune system cells to destroy foreign substances.
Answer:I’m not sure but I think it is the last one
Explanation:
The letter A in the diagram represents genes
