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': "Busacca's nodules: \nSelect and explain. \nA. Are a feature of nongranulomatous uveitis, B. Are situated at the pupillary border, C. Usually initiate posterior synechiae formation, D. Consists of lymphocytes, plasma cells, epitheloid and giant cells", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. Consists of lymphocytes, plasma cells, epitheloid and giant cells', 'role': 'assistant'}]