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: Ophthalmology
Which muscle is intorter of eye - 
Select and explain. 
A. Inferior oblique, B. Inferior rectus, C. Superior rectus, D. Medial rectus
C: Superior rectus
Answer: C: Superior rectus 
Explanation: The action of extraocular muscles can be summarized as follows -


All the recti muscles are adductor except lateral rectus which is abductor.
Both oblique muscles are abductors
Both the superior muscles (superior oblique and superior rectus) are intortors.
Both the inferior muscles (Inferior oblique and inferior rectus) are extorters.