This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
[{'content': "Oil drop cataract is characteristically seen in - \nSelect and explain. \nA. Diabetes, B. Chalcosis, C. Galactosemia, D. Wilson's disease", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Oil drop cataract is seen in galactosemia. Ref: Clinical ophthamology 2nd/e p.791.', 'role': 'assistant'}]