This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
[{'content': 'Superior orbital fissure syndrome involves which of the following cranial nerves? \nSelect and explain. \nA. II, III, IV, V and VI, B. Ill, IV, and first division of V and VI, C. VII and VIII, D. IX, X and XI', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b (III, IV, and first division of V and VI) (Ref: Harrison 18thJCh. 26)Major Openings of the Skull BaseApertureContentsCribriform plateOlfactory nerves, ethmoid arteriesOptic canalOptic nerve-sheath complex; Ophthalmic arterySuperior orbital fissureCranial nerves III, IV, VI and VI (ophthalmic nerve), Superior ophthalmic veinForamen ovaleV3 (mandibular nerve)Foramen rotundumV2 (maxillary nerve)Foramen spinosumMiddle meningeal arteryVidian canalVidian artery, Vidian nerveCarotid canal^Internal carotid arterySympathetic plexusJugular foramen, pars nervosa; CN IX and inferior petrosal sinusJugular foramen, pars vascularisInternal jugular vein; CN X and XIStylomastoid foramenCN VIIHypoglossal canalCN XIISupraorbital Fissure:Structures that pass through it:# Lacrimal nerve# Frontal nerve# Trochlear nerve# Superior branch of oculomotor nerve# Nasociliary nerve# Inferior branch of oculomotor nerve# Abducent nerve# Ophthalmic veins# Sympathetic nerves Cavernous Sinus content and veins drain with Rule of 3# 3 Afferent veins: Sphenoparietal sinus (Vault veins), Supf Middle cerebral Vein (Brain), Ophthalmic vein# 3 Efferent Veins: Superior petrosal sinus, Inferior Petrosal Sinus, Communicating vein to pterygoid plexus# 3 Contents; Cranial Nerves (III, IV, V1, V2 & VI)# 3 Areas Drain into it: Vault Bones, Brain (Cerebral Hemisphere), Orbit# 3 Nerves: Motor (III, IV,VI),Sensory (V1,V2), Sympathetic', 'role': 'assistant'}]