Final answer:
The inferior wall of the heart is primarily supplied by the right coronary artery (RCA), which runs along the coronary sulcus.
Step-by-step explanation:
The inferior wall of the heart is primarily supplied by the right coronary artery (RCA).
The RCA runs along the coronary sulcus and supplies blood to the right atrium, portions of both ventricles, and the heart conduction system. On the posterior surface of the heart, the RCA gives rise to the posterior interventricular artery, also known as the posterior descending artery, which supplies the interventricular septum and portions of both ventricles.
The other options mentioned, including the left anterior descending artery (LAD), left circumflex artery (LCX), and left coronary artery (LCA), primarily supply the left side of the heart.