  Let A_q(g) be the quantized algebra of functions associated with simple Lie
algebra g defined by generators obeying the so called RTT relations. We
describe the embedding $A_q(B_2) \hookrightarrow A_q(C_2)$ explicitly. As an
application, a new solution of the Isaev-Kulish 3D reflection equation is
constructed by combining the embedding with the previous solution for A_q(C_2)
by the authors.
