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
Jasper jumper is a 
Select and explain. 
A. Flexible fixed functional appliance, B. Rigid fixed functional appliance, C. Fixed functional appliance, D. None of the above
A: Flexible fixed functional appliance
Answer: A: Flexible fixed functional appliance 
Explanation: Herbst appliance is a rigid fixed functional appliance. Jasper jumper is a flexible fixed functional appliance.