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: Dental
[{'content': 'Efferent , Neuromodulatory , post ganglionic sympathetic nerve fibers of the pulp arise from \nSelect and explain. \nA. Superior cervical Ganglion, B. Nervous intermedius, C. Otic ganglion, D. Mandibular nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]