This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Most common site of aery of atherosclerosis ? \nSelect and explain. \nA. LAD, B. RCA, C. LCX, D. Diagonal branch of LAD', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., LADo Left anterior descending (LAD) aery is the most commonly involved aery.", 'role': 'assistant'}]