This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Surfaces and Grooves, Subject name: Anatomy
Boundary of triangle of auscultation is formed by all EXCEPT 
Select and explain. 
A. Scapula, B. Trapezius, C. Serratus anterior, D. Latissimus dorsi
C: Serratus anterior
Answer: C: Serratus anterior 
Explanation: Triangle of auscultation helps in hearing breath sounds clearly and splash sound of food entering stomach. The triangle is formed by: Trapezius - medial border, Lattismus Dorsii - lower border and Scapula- lateral border Fig. Triangle of auscultation