This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb bones and muscles (proximal region) & Scapular movements, Subject name: Anatomy
Deltoid muscle causes all EXCEPT:- 
Select and explain. 
A. Flexion of shoulder, B. Extension of shoulder, C. Internal rotation of shoulder, D. Adduction of shoulder
D: Adduction of shoulder
Answer: D: Adduction of shoulder 
Explanation: Deltoid muscle fibres Movements Middle (lateral) fibres abductor at shoulder joint Anterior fibres flexion and medial rotation Posterior fibres extension & lateral rotation