Explanation

The pulse felt at the wrist or neck is the pressure wave created by the rhythmic contraction (systole) of the heart's ventricles. This wave travels through the aorta and the main arteries, whose elastic walls expand and recoil with each beat — and it is this expansion and recoil of the aorta and main arteries that is felt as the pulse. It is not due to the heart chambers themselves, the valves in the veins, or the heart valves. The answer is (C). (Cross-checked with Testbook's CDS-I 2024 solutions.)