Which of the following is a difference between B cells and T cells?
a.One has a major role in antibody production, while the other has a major role in cytotoxicity.
b.One uses a receptor called BCR, while the other recognizes a receptor called TCR.
c.B cells are activated by free-floating antigens in the blood or lymph. T cells are activated by membrane-bound antigens.
d.T cells are produced in the thymus and B cells are produced in the bone marrow.