<prompt> Person is not able look down. WTiich extra ocular muscle is affected:Inferior obliqueInferior rectusSuperior rectusLateral rectus  <response>: Ans. b Inferior rectusRef : A.K. Khurana 6th ed. 337-39 The function of inferior rectus is depression of eyeball, which helps to see down. Its yoke muscle is superior oblique, which also has the similar function as inferior rectus. 