Ans. A i.e. Fibre for constrictor pupillae originate from Edinger Westphal nucleusOculomotor nerve (CN III)It arises from the anterior aspect of mesencephalon (midbrain).There are two nuclei for the oculomotor nerve:The oculomotor nucleus originates at the level of the superior colliculus.The muscles it controls are the striated muscle in levator palpebrae superioris and all extraocular muscles except for the superior oblique muscle and the lateral rectus muscle.The Edinger-Westphal nucleus supplies parasympathetic fibres to the eye the ciliary ganglion, and thus controls the sphincter pupillae muscle (effecting pupil constriction) and the ciliary muscle (affecting accommodation).