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: Radiology
Rare orbit sign is seen in: 
Select and explain. 
A. NF I, B. NF II, C. Sturge weber syndrome, D. Tuberous sclerosis
A: NF I
Answer: A: NF I 
Explanation: Ans. NF I