Question

The antibody production in response to a foreign infective agent is done by

• A. B-cell
• B. Fibrinogen
• C. Pathogen
• D. Phagocyte
• E. T cell

Answer 1

The correct option is A B-cell

B cells are one of the two types of lymphocytes (the others being T cells). All lymphocytes begin their development in the bone marrow. B cells are involved in humoral immunity; on encountering a foreign substance (antigen), the B lymphocyte differentiates into a plasma cell, which secretes immunoglobulin or antibodies against an antigen. Thus, the correct answer is option A.