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': 'Blue sclera is seen in –a) Alkaptonuriab) Osteogenesis imperfectac) Ehler – Danlos syndromed) Kawasaki syndrome \nSelect and explain. \nA. a, B. c, C. bc, D. ad', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Causes of blue sclera are Osteogenesis iniperfecta, Marfan syndrome, Ehler - Danlos syndrome, Pseudoxanthoma elasticum.', 'role': 'assistant'}]