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
Transfer of hinge opening axis is compulsory in: 
Select and explain. 
A. Partially edentulous, B. Complete edentulous, C. Orthodontics, D. Planning to change vertical dimensions
D: Planning to change vertical dimensions
Answer: D: Planning to change vertical dimensions 
Explanation: None