Multiple choice Which of the following is purely motor cranial nerve? Olfactory Optic Abducens Vagus None of these Reveal answer Fill a bubble to check yourself C Correct answer Explanation The abducent nerve or abducent nerve (the sixth cranial nerve, also called the sixth nerve or simply CNVI) is a somatic efferent nerve that, in humans, controls the movement of a single muscle, the lateral rectus muscle of the eye.