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 mandibular 3rd molar region, the grains of bone run in: 
Select and explain. 
A. Buccolingual direction, B. Vertical direction, C. Anteroposterior direction, D. Oblique direction
C: Anteroposterior direction
Answer: C: Anteroposterior direction 
Explanation: None