This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oral cavity, Subject name: Surgery
Radiographic finding of floating teeth can be seen in: 
Select and explain. 
A. Ectodermal dysplasis, B. Cleidocranial dysplasia, C. Osteopetrosis, D. Histiocytosis - X
D: Histiocytosis - X
Answer: D: Histiocytosis - X 
Explanation: Floating Tooth Sign On radiographic examination of mandible, erosion of the bony alveoli around the teeth, so that they seem to be floating in spaceQ Seen in histiocytosis XQ