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
In normal edge and centroid relationship 
Select and explain. 
A. Edge and centroid are in one plane, B. Edge is in front of centroid, C. Edge is behind the centroid, D. None of the above
B: Edge is in front of centroid
Answer: B: Edge is in front of centroid 
Explanation: None