This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Brain , Subject name: Anatomy
[{'content': 'Nucleus of oculomotor nerve is in \nSelect and explain. \nA. Midbrain, B. Pons, C. Medulla, D. Thalamus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The oculomotor nucleus is located in the central grey matter of midbrain at the level of superior colliculus. The oculomotor nucleus is in the ventromedial pa. The Edinger - Westphal nucleus (visceral oculomotor nucleus) is located dorsal to the rostral two-thirds of main oculomotor nucleus. (Ref: Vishram Singh textbook of clinical neuroanatomy, second edition pg-85)', 'role': 'assistant'}]