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
Which of the following maxillary major connector provides the greatest retention: 
Select and explain. 
A. Palatal strap., B. Complete palate., C. Double palatal bar., D. U shaped.
B: Complete palate.
Answer: B: Complete palate. 
Explanation: None