This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
Which muscle is intoer 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: Actions of extraocular muscles : Muscle Primary Secondary Teiary action action action LR Abduction -- -- SR Elevation Intorsion Adduction IR Depression Extorsion Adduction SO Intorsion Depression Abduction IO Extorsion Elevation Abduction Ref;A.K.Khurana ; 6th edition; Page no:339