This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ocular motility and squint, Subject name: Ophthalmology
[{'content': 'Action of right superior oblique muscle is- \nSelect and explain. \nA. Dextro depression, B. Dextro elevation, C. Levo elevation, D. Levo depression', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Levodepression is movement to the left and downside. It is caused by simultaneous action of left inferior rectus and right superior oblique muscle Dextroelevation: Right superior rectus and left inferior oblique Levoelevation: Left superior rectus and right Inferior oblique Dextroversion: Right lateral rectus and left medial rectus Levoversion: Left lateral rectus and right medial rectus Dextrodepression: Right inferior rectus and left superior oblique Ref; A K Khurana ; 6 th edition ; Page no: 339', 'role': 'assistant'}]