Answer:
The correct answer is option - IgD.
Explanation:
BCR or B- cell receptors are the antigen-specific receptors with different specificities but their function depends on the T cells however their activation does not rely on T cells.
IgD and IgM are BCR for the naive mature B- cells. These are membrane-bound monomeric forms with 2 heavy chains and 2 light chains. There are more than 100000 BCRs present on every Naive mature B- cell.
Thus, the correct answer is option - IgD