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': 'Commonest ocular sign of hypothyroidism is \nSelect and explain. \nA. Cataract, B. Glaucoma, C. Band-shaped keratopathy, D. Uveitis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Cataract - hypothyroidism\nDarlymple sign - Graves disease.', 'role': 'assistant'}]