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: Ophthalmology
[{'content': 'Bitemporal hemianopia is associated with lesions of the: \nSelect and explain. \nA. Optic tract, B. Central chiasma, C. Lateral pas of chiasma, D. Optic radiations', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Central chiasma', 'role': 'assistant'}]