Respuesta :
An antibody is a protein of the gamma globulin class that reacts with an antigen; found in the blood plasma, in other body fluids, and on the surgaces of certain leukocytes and their derivatives
Answer:
Well, you didn't give us the options so I can tell you what they actually do.
Antibodies attach to cells with the corresponding antigen.
Explanation:
(Definition)
Antibody: a protein formed by immune-responsive cells that is specific for a particular antigen and can bind to it to inactivate or destroy it