Final answer:
The statement in question is true; clonal selection of B cells does indeed produce both plasma B cells, which secrete antibodies to fight pathogens, and memory B cells, which retain the antigen information for a faster and stronger response upon re-exposure.
Step-by-step explanation:
The statement that clonal selection of B cells results in the production of two types of clones, plasma cells and memory B cells, is true. When a B cell is activated by an antigen, with the help of helper T cells, it undergoes clonal selection and expansion. Only the B cells with receptors specific to that antigen are selected. These selected B cells differentiate into two types of cells. One type is the plasma B cells, which produce and secrete large quantities of antibodies specific to the antigen. These antibodies are critical components of the body's humoral immunity, binding to pathogens found in bodily fluids and neutralising them. The other type is the memory B cells. These cells do not produce antibodies immediately. Instead, they persist in the body for long periods, retaining the specific information about the pathogen. Upon a subsequent exposure to the same pathogen, they enable the immune system to mount a quicker and stronger response.