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: Pediatrics
Which of the following is seen in Marfan's syndrome 
Select and explain. 
A. Caused by mutation of fibrillin - 1 gene, B. Flat cornea seen, C. Aortic aneurysm occurs, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Clinical features of Marfan's syndrome:
Reduced US : LS ratio
↑ Arm span
Arachnodactyly
Aortic aneurysm
Mitral valve prolapse
Supero - temporal dislocation of lens
Flat cornea.