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': 'Pituitary tumour causes: \nSelect and explain. \nA. Binasal hemianopia, B. Homonymous hemianopia, C. Monocular blindness, D. Bitemporal hemianopia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Bitemporal hemianopia', 'role': 'assistant'}]