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: Surgery
Most common cause of hyperparathyroidism is 
Select and explain. 
A. Di George syndrome, B. Following thyroid surgery, C. Mccune albright syndrome, D. Parathyroid hypoplasia
B: Following thyroid surgery
Answer: B: Following thyroid surgery 
Explanation: Most common cause of hypoparathyroidism is iatrogenic cause that is accidental removal of parathyroid glands during thyroidectomy.