This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cranial Nerves, Subject name: Anatomy
[{'content': 'Greater petrosal nerve is formed from: \nSelect and explain. \nA. Geniculate ganglion, B. Plexus around ICA, C. Plexus around middle meningeal aery, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Greater petrosal nerve is a branch of facial nerve, given at geniculate ganglion. Geniculate ganglion has sensory and secretomotor neurons, whose axons travel by greater petrosal nerve. Sympathetic fibers from the superior cervical ganglion form plexus around the internal carotid aery to contribute to Deep petrosal nerve and around middle meningeal aery to reach the otic ganglion.', 'role': 'assistant'}]