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: Surgery
Radiographic finding of floating teeth can be seen in ? 
Select and explain. 
A. Ectodermal dysplasis, B. Cleido cranial dysplasia, C. Osteopetrosis, D. Histiocytosis - X
D: Histiocytosis - X
Answer: D: Histiocytosis - X 
Explanation: Ans. is 'd' i.e., Histiocytosis X