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
Boundary of triangle of auscultation is not formed by: 
Select and explain. 
A. Senatus anterior, B. Scapula, C. Trapezius, D. Latissimus dorsi
A: Senatus anterior
Answer: A: Senatus anterior 
Explanation: Serratus anterior Repeat from May 11