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
All the following are seen in Hyperparathyroidism except 
Select and explain. 
A. Subperiosteal erosion of bone, B. Loss of lamina dura, C. Calvarial thickening, D. Pepper - pot skull
C: Calvarial thickening
Answer: C: Calvarial thickening 
Explanation: Calvarial thickening is a feature of Hypoparathyroidism.