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: Dental
Gracey curette No. 11-12 are used for 
Select and explain. 
A. Anterior teeth, B. Posterior teeth mesial, C. Posterior teeth distal, D. Posterior teeth facial and lingual
B: Posterior teeth mesial
Answer: B: Posterior teeth mesial 
Explanation: None