This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
on a patient with parathyroid adenoma how do we confirm the removal of the coresect gland after surgery ? 
Select and explain. 
A. 25 % seduction in PTH within 5 min of gland removal, B. 50% reduction in PTH within 10 mins of gland removal, C. 25% reduction in PTH within 10 min of gland removal, D. 50% reduction in PTA within 5min of gland removal
B: 50% reduction in PTH within 10 mins of gland removal
Answer: B: 50% reduction in PTH within 10 mins of gland removal 
Explanation: ref : bailey and love 27th ed