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
Atmospheric pressure as a factor of retention is effective only 
Select and explain. 
A. If saliva is present, B. If adequate peripheral seal is present, C. If principle of mucostatics is applied, D. If good neuromuscular co-ordination is present
B: If adequate peripheral seal is present
Answer: B: If adequate peripheral seal is present 
Explanation: None