The option that depicts the pathway of nerve impulse during the excitation and contraction of human heart is:

Explanation

The correct pathway of nerve impulse during the excitation and contraction of the human heart is: SA node > AV node > Purkinje fibres > ventricles. The sinoatrial (SA) node, located in the right atrium, acts as the primary pacemaker of the heart by initiating the electrical impulse. This impulse travels to the atrioventricular (AV) node, located at the junction of the atria and ventricles. From the AV node, the impulse moves to the bundle of His and then to the Purkinje fibres, which distribute the impulse throughout the ventricles, causing them to contract. This sequence ensures the coordinated contraction of the heart muscle, which is essential for efficient blood pumping.