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
[{'content': 'All the muscles are used to abduct the shoulder except - \nSelect and explain. \nA. Deltoid, B. Supraspinatus, C. Serratus anterior, D. Pectoralis major', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Muscles responsible for abduction of the shoulder joint\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Supraspinatus- first 15 degrees of abduction\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Deltoid (Acromial fibers)- it is responsible for abduction from 15 to 90 degrees.\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Trapezius and serratus anterior- They are responsible for upward rotation of the glenoid cavity.', 'role': 'assistant'}]