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: Medicine
[{'content': 'S2 is best appreciated in \nSelect and explain. \nA. 3rd left intercostal space, B. 2nd right intercostal space, C. 4th left intercostal space, D. 5th left intercostal space', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 3rd left intercostal space", 'role': 'assistant'}]