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': 'Megalocornea is associated with A/E – \nSelect and explain. \nA. Down syndrome, B. Turner syndrome, C. Marfan syndrome, D. Ehler danlos syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Systemic diseases causing megalcornea are Marfan syndrome, Apert syndrome, Ehler danlos syndrome and Down syndrome.', 'role': 'assistant'}]