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: Anatomy
[{'content': 'The boundary of the triangle of auscultation is not formed by \nSelect and explain. \nA. Serratus anterior, B. Scapula, C. Trapezius, D. Latissimus dorsi', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Triangle of auscultation is bounded medially by the lateral border of the trapezius, laterally by scapula and inferiorly by lattismus dorsi', 'role': 'assistant'}]