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
Wormain bones are seen in 
Select and explain. 
A. Hypothyroidism, B. Down's syndrome, C. Osteogenesis impefecta, D. All the above
D: All the above
Answer: D: All the above 
Explanation: These are intrasutural bony ossicles in lambdoid, posterior sagittal, temporosquamosal sutures of skull.