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
Blue Sclera is associated with: March 2009 
Select and explain. 
A. Osteogenesis imperfecta, B. Marfan's syndrome, C. Alkaptonuria, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. D: All of the above Causes of blue Sclera: Pseudoxanthoma elasticum Osteogenesis imperfecta Ehlers-Danlos syndrome Marf an's syndrome Alkaptonuria Hypophosphatasia Juvenile paget's disease Normal in newborns Van der Hoeve's syndrome