Detailed Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Problem:Question: The simultaneous expression of IgM and IgD as membrane immunoglobulins occurs in:
Options: <0> B cells that respond to thymoindependent antigens. <1> B cells that respond to thymus-dependent antigens. <2> Activated B cells stimulated by Interleukin 4 (IL-4). <3> Immature virgin B cells. <4> Mature virgin B cells.
Solution:
pharmacology