<prompt> Cranial Nerve which emerges from dorsal surface of brainIIIVVIVII  <response>: B i.e. Trochlear Nerve i.e. IVth C.NNerveFeatureTrochlear 4thEmerge dorsally from the brain stem 2Longest Intracranial course Trigeminal 5thLargest cranial nerve Vagus 10thMost extensive distribution Facial 7thMost commonly paralyzed Facial 715Longest intraosseous course Abducent 6hMost commonly involved in raised ICTOcculomotor 3,d Abducent 6thCommonly involved in inracranial aneurysm. 