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
All the muscles are used to abduct the shoulder except - 
Select and explain. 
A. Deltoid, B. Supraspinatus, C. Serratus anterior, D. Pectoralis major
D: Pectoralis major
Answer: D: Pectoralis major 
Explanation: Muscles responsible for abduction of the shoulder joint
-        Supraspinatus- first 15 degrees of abduction
-        Deltoid (Acromial fibers)- it is responsible for abduction from 15 to 90 degrees.
-        Trapezius and serratus anterior- They are responsible for upward rotation of the glenoid cavity.