This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Unknown
[{'content': 'The greater petrosal nerve is formed from - \nSelect and explain. \nA. Geniculate ganglion, B. Plexus around ICA, C. Plexus around middle meningeal artery, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans-A', 'role': 'assistant'}]