Which one of the following statements is correct with respect to immunity?

Options

A. Performed antibodies need to be injected to treat the bite by a viper snake
B. The antibodies against smallpox pathogen are produced by T-lymphocytes
C. Antibodies are protein molecules, each of which has four light chains
D. Rejection of a kidney graft is the funtion of B-lymphocytes

Answer

A

Explanation

In artificial acquired passive immunity, preformed antibody in an immune serum is introduced into the body, as the antivenom serum used to treat snake bites. In this case, the body does not produce any antibodies by itself.
Antibody is a protein molecule having two light chains and two heavy chains. B-cells recognise and bind antigens and may differentiate to memory cell or plasma cells (produce antibody as in smallpox infection). T cells causes transplant rejection.