<prompt> Which of the following muscles produce intorsion of eye ball-?Superior rectus and superior obliqueInferior rectus and inferior obliqueInferior rectus and superior obliqueSuperior rectus and inferior oblique  <response>: Ans. A. Superior rectus and superior obliqueMusclePrimarySecondaryTertiaryMedial rectusAdduction--Lateral rectusAbduction--Inferior rectusDepressionExtorsionAdductionSuperior rectusElevationIntorsionAdductionInferior obliqueExtorsionElevationAbductionSuperior obliqueIntorsionDepressionAbduction 