Which of the following is responsible for the production of antibodies specific to an infecting agent?
Phagocytes are the component of the non specific immune response.The encounter of B cell with a specific antigen activates its clonal expansion which in turn gives rise to plasma cell and memory cells. A plasma cell is a mature B cell that serves in mass production of antibodies against a specific antigen. Pathogens are the disease-causing organisms that carry antigens. Fibrinogen is involved in the clotting process. T cells are responsible for cell-mediated immunity. Thus, the correct answer is A.