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': "All are clinical features of chalcosis except \nSelect and explain. \nA. Kayser - Fleischer ring, B. Sun - flower cataract, C. Deposition of golden plaques at the posterior pole, D. Dalen- fuch's nodules.", 'role': 'user'}, {'content': "Answer: D \nExplanation: Dalen - fuch's nodules are formed due to proliferation of the pigment epithelium ----- sympathetic ophthalmitis.", 'role': 'assistant'}]