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': 'Koeppe nodules are present on – \nSelect and explain. \nA. Cornea, B. Conjunctiva, C. Iris, D. Retina', 'role': 'user'}, {'content': "Answer: C \nExplanation: Iris nodules\n\nThere are many types of nodules that develop on iris in granulomatous uveitis:-\n\n\nKoeppe nodule: - Seen at pupillary margin.\nBusacca's nodule: - Seen on the peripheral part of the anterior surface of iris.\nTubercular nodules: - Scattered throughout the iris and ciliary body, mostly in the stroma. They are more common at pupillary margin.\nSyphilitic nodules:-At pupillary margin.\nSarcoid nodules:-At pupillary margin or in the stroma of the iris.", 'role': 'assistant'}]