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: Medicine
[{'content': "Horner's syndrome. All true except- \nSelect and explain. \nA. Miosis, B. Anhydrosis, C. Hyperchromatic iris, D. Apparent exophthalmos", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]