For Each of the Descriptions in Questions ,Select the B

Multiple Choice

For each of the descriptions in questions ,select the B cell signaling molecule (A-I) that most closely matches it.
-A protein that covalently binds to microbes and serves as a ligand for a coreceptor that enhances B cell responses to antigen

A) Iga
B) Igb
C) C3b
D) C3d
E) CR2
F) CD19
G) CD81
H) Fyn
I) Syk