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: Surgery
Ashley's flap is: 
Select and explain. 
A. Palatal rotation flap., B. Buccal pedicle flap., C. Buccal free flap., D. Palatal free flap.
A: Palatal rotation flap.
Answer: A: Palatal rotation flap. 
Explanation: None