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
Differential force concept is mainly used in 
Select and explain. 
A. Straight wire appliance, B. Lingual appliance, C. Begg's Light wire appliance, D. Frankel appliance
C: Begg's Light wire appliance
Answer: C: Begg's Light wire appliance 
Explanation: None