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
In periodontal flap most important factor to be considered is: 
Select and explain. 
A. Depth of vestibule, B. Frenum attachment, C. Amount of attached gingiva, D. Free gingiva
C: Amount of attached gingiva
Answer: C: Amount of attached gingiva 
Explanation: None