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': "Marfan's syndrome has which of the following prominent eye defects? \nSelect and explain. \nA. Megalocornea, B. Microcornea, C. Microspherophakia, D. Ectopia lentis", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Marfan\'s syndrome is characterized by ectopia lentis (superior-temporal) 80% and megalocornea 15% in the eye. Ref: A.K KHURANA (2005), Chapter 8, "Disease of The Lens", In the book, "Opthalmology", 3rd Edition, Newdelhi, Page 210', 'role': 'assistant'}]