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 function of an occlusal rest seat is 
Select and explain. 
A. To resist vertical force of occlusion, B. Stabilize the denture, C. To prevent the lateral forces acting on the tooth, D. Increase retention of partial denture
A: To resist vertical force of occlusion
Answer: A: To resist vertical force of occlusion 
Explanation: None