<prompt> Longest intracranial course is of -Trochlear nerveAbducent nerveOptic nerveOculomotor nerve  <response>: Ans. is a i.e., Trochlear nerve o Trochlear nerve has the longest intracranial courseo Vagus nerve has the longest overall course intracranial extracranial.o Longest intracranial course-Trochlear nerveo Longest course overall and most widely distributed-Vaguso Smallest thinnest cranial nerve-Trochlear nerveo Largest thickest cranial nerve-Trigeminal nerveo The only cranial nerve arising from dorsal aspect-Trochlear nerveo Only cranial nerve decussating completely before emerging-Trochlear nerveo Cranial nerve most commonly involved in basal skull fracture-Facial nerveo Cranial nerve most commonly involved in raised intracranial tension-Abducent nerveo Commonest cranial nerve affected in spinal anaesthesia-Abducent nerveo Cranial nerve most commonly involved in intracranial aneurysm-Oculomotor nerveo Cranial nerves carrying parasympathetic fibers-3,7, 9, 10 