This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Orbit, Subject name: Anatomy
Which of the following muscles produce intorsion of eye ball-? 
Select and explain. 
A. Superior rectus and superior oblique, B. Inferior rectus and inferior oblique, C. Inferior rectus and superior oblique, D. Superior rectus and inferior oblique
A: Superior rectus and superior oblique
Answer: A: Superior rectus and superior oblique 
Explanation: Ans. A. Superior rectus and superior obliqueMusclePrimarySecondaryTertiaryMedial rectusAdduction--Lateral rectusAbduction--Inferior rectusDepressionExtorsionAdductionSuperior rectusElevationIntorsionAdductionInferior obliqueExtorsionElevationAbductionSuperior obliqueIntorsionDepressionAbduction