Communicating junctions of cardiac muscles are represented by

$\begin{array}{1 1}(A)\;\text{Gap junctions}\\(B)\;\text{Intercalated discs}\\(C)\;\text{Tight junctions}\\(D)\;\text{All of these}\end{array}$

Communicating junctions of cardiac muscles are represented by intercalated discs
Hence (B) is the correct answer.