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': 'Right homonymous hemianopia is caused by lesion of: September 2012 \nSelect and explain. \nA. Left optic radiation, B. Right geniculate body, C. Right optic nerve, D. Right optic radiation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A i.e. Left optic radiation Visual field defects Homonymous hemianopia: Lesions of optic tract (incongruous defects) Homonymous quadrantaopia: Lesion of temporal lobe (superior) Bitemporal hemianopia: Lesions of optic chiasm', 'role': 'assistant'}]