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
Protractor of scapula is? 
Select and explain. 
A. Serratus anterior, B. Rhomboidis major, C. Deltoid, D. Pectoralis major
A: Serratus anterior
Answer: A: Serratus anterior 
Explanation: Serratus anteriorREF: Gray's anatomy 39th ed p. 829, 830Movements of scapula:MovementMusclesElevationTrapezius and Levator scapularProtractionSerratous anterior and Pectoralis minorRetractionRhomboids and TrapeziusLateral rotationupper trapezius and lower serratousMedial rotationLevator scapulae , Rhomboids and Pectoralis minor