This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Investigation in ophthalmology and miscellaneous topics, Subject name: Ophthalmology
[{'content': "Blue sclera is associated with: \nSelect and explain. \nA. Marfan's syndrome, B. Osteogenesis imperfecta, C. Buphthalmos, D. All of the above", 'role': 'user'}, {'content': "Answer: D \nExplanation: Blue sclera is asymptomatic condition d/t thinning of sclera, associted with : Osteogenesis imperfecta. Congenital Glaucoma Marfan's syndrome Ehlers-Danlos syndrome, Pseudoxanthoma elasticum, Buphthalmos High myopia Healed scleritis. Neveus of ota Extra edge: Thickening of sclera is seen in posterior scleritis, Nanophthalmus etc", 'role': 'assistant'}]