Answer:
Lymphocyte, specifically, B-lymphocytes
Explanation:
Lymphocytes are a kind of white blood cells, or leukocytes. They are divided into two categories, which are B-lymphocytes and T-lymphocytes.
B-lymphocytes are the ones that produce antibodies and each b-lymphocyte produce a specific antibody. They are triggered by antigens that are specific to them, which stimulates the production of plasma cells, which are responsible for producing antibodies.