This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Sclera, Subject name: Ophthalmology
[{'content': 'Blue sclera is seen in - \nSelect and explain. \nA. Alkaptonuria, B. Osteogenesis imperfect, C. Down syndrome, D. Kawasaki syndrome', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Osteogenesis imperfect * Blue scleral discoloration is caused by thinning or transparency with resultant visualization of the underlying uvea.* Causes of blue sclera are: Osteogenesis imperfecta, Marfan syndrome, Ehler - Danlos syndrome, Pseudoxanthoma elasticum.", 'role': 'assistant'}]