The following are yoke muscles:
a. right medial rectus and left lateral rectus
b. right inferior rectus and left superior rectus
c. right superior rectus and left inferior oblique
d. right superior oblique and left inferior rectus
a. right medial rectus and left lateral rectus
b. right inferior rectus and left superior rectus
c. right superior rectus and left inferior oblique
d. right superior oblique and left inferior rectus