Correct Answer - A
In artificially acquired passive immunity, preformed antibody in an immune serum of some other animal is introduced into the body. As the antivenum used to treat snake bites. In this case, the body does not produce any antibodies. Antibody is a protein molecule having two light chain and two heavy chain. B-cells recognise and bind antigens and may differentiate to memory cell or plasma cells (produce antibody). T-cells causes transplant rejection.
