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': "Dalrymple's sign of ocular Graves' disease refers to: \nSelect and explain. \nA. Retraction of the upper lid, B. Lid lag, C. Proptosis, D. All of the above combinedly", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Retraction of the upper lid', 'role': 'assistant'}]