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 is the peculiar feature of Pierre Robin sequence: 
Select and explain. 
A. V shaped cleft palate., B. U shaped cleft palate., C. L shaped cleft palate., D. Absence of cleft palate.
B: U shaped cleft palate.
Answer: B: U shaped cleft palate. 
Explanation: None