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: Anatomy
[{'content': 'All are seen in the floor of 3rd ventricle except? \nSelect and explain. \nA. Infundibulum, B. Oculomotor nerve, C. Mammillary body, D. Optic chiasmaFouh Ventricle', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Occulomotor Nerve', 'role': 'assistant'}]