Final answer:
A given B cell can produce IgM and IgD antibodies, and they will be the same apart from their Fc region.
Step-by-step explanation:
Yes, the statement is true. A given B cell can produce IgM and IgD antibodies, and they will be the same apart from their Fc region. Both IgM and IgD antibodies have the same Fab region, which is responsible for binding to specific antigen epitopes. The Fc region, on the other hand, differs between IgM and IgD antibodies and determines the immunological mechanism of action of each antibody class.