The Following Are Various Components of the Conducting System of the Heart

Multiple Choice

The following are various components of the conducting system of the heart:
1) Purkinje cells
2) AV bundle
3) AV node
4) SA node
5) bundle branches
The sequence in which an action potential would move through this system is

A) 1, 4, 3, 2, 5.
B) 3, 2, 4, 5, 1.
C) 3, 5, 4, 2, 1.
D) 4, 3, 2, 5, 1.
E) 4, 2, 3, 5, 1.