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
What is the force generated by lip musculature on the upper incisor teeth at rest? 
Select and explain. 
A. 15-20 g/square cm, B. 20-25 g/square cm, C. 10-15 g/square cm, D. 30-35 g/square cm
B: 20-25 g/square cm
Answer: B: 20-25 g/square cm 
Explanation: The forces generated by lip musculature on the upper incisor teeth at rest is 20-25 g/square cm.