<prompt> Cranial nerve not carrying parasympathetic fibersFourthSeventhThirdNinth  <response>: Ans. is a i.e. Fourth Four cranial nerves CN III, CN VII, CNIX CN X carry presynaptic parasympathetic visceral motor axons as they emerge from brain stem.Parasympathetic fibres carrying cranial nervesAssociated GanglionOcculomotor IIICiliary ganglionFacial VIIPterygopalatine Submandibular ganglionGlossopharyngeal IXOtic ganglionVagus XVisceral ganglionsAlso know:Pure motorPure sensory uniquespecial sensation carryingMixedOcculomtor IIITrochlear IVAbducent VISpinal accessory XIHypoglossal XIIOlfactory IOptic IIVestibulocochlear VIIITrigeminal VFacial VIIGlossopharyngeal IXVagus XOlfactory nerve CNI is the only sensory cranial nerve that projects directly to the cerebral cortexOptic nerve terminates in the thalamus while the other ten pairs of C.N. are attached to brain stem.Except the vagus N., all the cranial nerves are confined to head neck.Trochlear N. is the only cranial nerve to emerge from the dorsal surface of the brain stem.Trochlear N. is the smallest cranial nerve in terms of axons it contains. It supplies only one muscle - the superior oblique.Trochlear N. has the longest intracranial course. 