Final answer:
ST elevation in leads V1 and V2 suggests that the left anterior descending artery, which is a branch of the left coronary artery, is involved.
Step-by-step explanation:
ST elevation in leads V1 and V2 is indicative of an issue with the left anterior descending (LAD) artery, which is a major branch of the left coronary artery. The LAD follows the anterior interventricular sulcus and supplies blood to the front part of the heart, including the interventricular septum and portions of both ventricles. When there is an ST elevation in leads V1 and V2, it usually suggests that there is acute injury or ischemia in the territory supplied by the LAD. Therefore, the correct answer to which of the coronary arteries is involved when there is ST elevation in leads V1 and V2 is C. Left anterior descending artery.