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
Lingual plate is indicated in all, except 
Select and explain. 
A. Periodontally weakened tooth, B. Anterior ridge resorption, C. High Lingual frenum, D. Vestibule of more than 8 mm
D: Vestibule of more than 8 mm
Answer: D: Vestibule of more than 8 mm 
Explanation: None