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
Lateral repositioning flap is done for 
Select and explain. 
A. gingival recession, B. high frenal attachment, C. increasing the width of attached gingiva, D. shallow vestibule
A: gingival recession
Answer: A: gingival recession 
Explanation: None