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
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: Ans. is 'b' i.e., Pectoralis minor