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': 'Clinical manifestations of chalcosis include all of the following except: \nSelect and explain. \nA. Kayser-Fleischer ring, B. Sunflower cataract, C. Greenish discolouration of iris, D. Deposition of golden plaque at the posterior pole of the retina', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Greenish discolouration of iris', 'role': 'assistant'}]