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': 'Function of superior oblique muscle is: \nSelect and explain. \nA. Intorsion, adduction and depression, B. Intorsion, abduction and elevation, C. Intorsion, abduction and depression, D. Extorsion, abduction and depression', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The primary action of the superior oblique muscle is intorsion (internal rotation), the secondary action is depression (primarily in the adducted position) and the teiary action is abduction.', 'role': 'assistant'}]