<prompt> Dilator papillae are supplied byOculomotor nerveSympathetic fibers from the fronto - orbital branch of trigeminal nervePostganglionic sympathetic fibers from cervical sympathetic chainPostganglionic parasympathetic fibers  <response>: Dilator papillae are supplied by sympathetic fibers, which arises from the inter medio lateral horn of spinal cord segment of T-1 These pre-ganglionic T-1 sympathetic fibersclimbs up the cervical sympathetic chain and synapse in the superior highestcervical ganglion. Postganglionic fibers makes sympathetic plexus around the internal carotid aery and reach the dilator papillae muscle. Ref: Grays 39ep-227 