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': "'Iris-pearls' are seen in: \nSelect and explain. \nA. Syphilis, B. Leprosy, C. Sarcoidosis, D. Tuberculosis", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Leprosy', 'role': 'assistant'}]