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: Orthopaedics
Brown Tumor is seen in - 
Select and explain. 
A. Hypothyroidism, B. Hyperthyroidism, C. Hypoparathyroidism, D. Hyperparathyroidism
D: Hyperparathyroidism
Answer: D: Hyperparathyroidism 
Explanation: Brown's tumor is seen in hyperparathyroidism