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
Working end of cryer elevator is placed at 
Select and explain. 
A. Junction of interseptal bone and mesiobuccal portion of root, B. Over the interradicular bone, C. Distobuccal root, D. Between the teeth and gingiva
B: Over the interradicular bone
Answer: B: Over the interradicular bone 
Explanation: None