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
[{'content': 'Deltoid muscle causes all EXCEPT:- \nSelect and explain. \nA. Flexion of shoulder, B. Extension of shoulder, C. Internal rotation of shoulder, D. Adduction of shoulder', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Deltoid muscle fibres Movements Middle (lateral) fibres abductor at shoulder joint Anterior fibres flexion and medial rotation Posterior fibres extension & lateral rotation', 'role': 'assistant'}]