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': 'What are the only muscles that perform internal rotation at the GHJ? \nSelect and explain. \nA. Latissimus Dorsi,, B. Teres Major, C. Pec Major, D. Subscapularis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: of arm/humerus\xa0at shoulder.\xa0Anterior deltoid muscle.\xa0Subscapularis. ...\nof thigh/femur at hip. Tensor fasciae latae. Gluteus minimus. ...\nof leg at knee. Popliteus. Semimembranosus. ...\nof eyeball (motion is also called "intorsion" or incyclotorsion)\xa0Superior rectus muscle.\xa0Superior oblique muscle.', 'role': 'assistant'}]