Which one of the following statement is correct with respect to immunity

Options

A. Preformed 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 function of B-lymphocytes

Answer

A

Explanation

The antibodies against smallpox pathogen are produced by B lymphocytes. Antibodies are protein molecules that have two light and two heavy chain. Rejection of a kidney graft is the function of T lymphocytes