T cells are important to our immune system, but they do not release antibodies. They activate B cells and cytotoxic T lymphocytes to kill cells that are infected. Therefore, D is incorrect.
Antibiotics are not produced by our immune system. They can be found in nature or synthesized in labs. Therefore, B is incorrect too.
Lymphocytes are divided into T and B cells. B lymphocytes release antibodies that will recognize pathogens and bind to them, but T cells doesn't work like that. Lymphocyts does not recognize pathogens and C is incorrect as well.
B cells create antibodies, release them and they will bind to pathogens to neutralize them. Therefore, the correct answer is A. B cells release antibodies that neutralize the pathogen.