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': 'Homonymous hemianopia type of visual field defect is seen in all except ? \nSelect and explain. \nA. Lateral geniculate body, B. Total optic radiation, C. Optic tract, D. Optic chaisma', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Optic chaisma", 'role': 'assistant'}]