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
The most frequent curvature of maxillary first molar root is 
Select and explain. 
A. Mesial, B. Distal, C. Buccal, D. Lingual
C: Buccal
Answer: C: Buccal 
Explanation: None