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
What are the only muscles that perform internal rotation at the GHJ? 
Select and explain. 
A. Latissimus Dorsi,, B. Teres Major, C. Pec Major, D. Subscapularis
A: Latissimus Dorsi,
Answer: A: Latissimus Dorsi, 
Explanation: of arm/humerus at shoulder. Anterior deltoid muscle. Subscapularis. ...
of thigh/femur at hip. Tensor fasciae latae. Gluteus minimus. ...
of leg at knee. Popliteus. Semimembranosus. ...
of eyeball (motion is also called "intorsion" or incyclotorsion) Superior rectus muscle. Superior oblique muscle.