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': "A lesion of the optic radiation involving the Meyer's loop causes- \nSelect and explain. \nA. homonymous hemianopia, B. Superior quadrantopia, C. Inferior quadrantopia, D. central scotoma", 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Superior quadrantopia', 'role': 'assistant'}]