This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Extremity, Subject name: Anatomy
Flexion, adduction and medial rotation of arm is done by which muscle? 
Select and explain. 
A. Pectoralis minor, B. Pectoralis major, C. Subclavius, D. Serratus Anterior
B: Pectoralis major
Answer: B: Pectoralis major 
Explanation: Ans. B Pectoralis majorAnatomy of pectoralis major muscle:* Origin: Clavicle, sternum and costal cartilage 2nd - 6th ribs* Insertion: Lateral lip of intertubercular groove of humerus* Function: Flexion, adduction and medial rotation of arm