A 59-year-old lady is admitted with a 30 minute history of heavy central chest pain associated with nausea and sweating. Her ECG shows ST elevation in leads V1, V2, V3 and V4. Which of the following coronary arteries is most likely to be occluded? A) Circumflex artery B) Left anterior descending artery C) Obtuse marginal artery D) Posterior descending artery E) Right coronary artery