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: Medicine
In hyperparathyroidism all seen except - 
Select and explain. 
A. osteopetrosis, B. Osteoporosis, C. Cysts, D. Brown tumor
A: osteopetrosis
Answer: A: osteopetrosis 
Explanation: None