This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
Which of following muscle has no action at shoulder joint 
Select and explain. 
A. Teres major, B. Pectoralis minor, C. Subscapularis, D. Trapezius
B: Pectoralis minor
Answer: B: Pectoralis minor 
Explanation: Movements of the shoulder joint are flexion, extension, adduction, abduction, medial and lateral rotation. These are mainly caused by the muscles pectoralis major, deltoid, latissimus dorsi, teres major and minor and supraspinatus. BD chaurasia 7th edition,page 149-table 10.1