Select the correct pathway for the transmission of cardiac impulses.

• A
  $AV$ node $\rightarrow$ $SA$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ Purkinje fibers
• B
  $SA$ node $\rightarrow$ $AV$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ Purkinje fibers
• C
  $SA$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ $AV$ node $\rightarrow$ Purkinje fibers
• D
  $AV$ node $\rightarrow$ Bundle of $His$ $\rightarrow$ $SA$ node $\rightarrow$ Purkinje fibers