This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
X-ray features of hypoparathyroidism are the following except - 
Select and explain. 
A. Osteosclerosis, B. Calvarial thickening, C. Subperiosteal resorption, D. Subcutaneous calcification
C: Subperiosteal resorption
Answer: C: Subperiosteal resorption 
Explanation: Subperiosteal resorption is the characteristic feature of hyperparathyroidism. Radiological features of Hypoparathyroidism : Osteosclerosis Calvarial thickening Subcutaneous calcifications Thickened lamina dura