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': 'The actions of superior oblique muscle is A/E: \nSelect and explain. \nA. Abduction, B. Intorsion, C. Extorsion, D. Depression', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e., Extorsion', 'role': 'assistant'}]