This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pathology
[{'content': 'Most common arteries are involved in Myocardial infarction: \nSelect and explain. \nA. Right coronary artery, B. Left coronary artery, C. Left anterior descending coronary artery, D. Left circumflex coronary artery', 'role': 'user'}, {'content': 'Answer: C \nExplanation: (Left anterior descending coronary artery): Ref: 577-R (392- Basic pathology 8th)Myocardial infarction: - Commonly affected arteries1. Left anterior descending coronary artery (40% to 50%) infarct involves anterior wall of the left ventricle, near apex, anterior portion of ventricular septum; apex circumferentially2. Right coronary artery (30 to 40%) infarct involves inferior/posterior wall of left ventricles, posterior portion of ventricular septum; inferior/posterior right ventricular free wall in some cases3. Left circumflex coronary artery (15% to 20%) infact involves lateral wall of left ventricles except at apex.', 'role': 'assistant'}]