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
Reverse head gear is used mainly 
Select and explain. 
A. To retract maxilla, B. To induce the growth of maxilla in skeletal retrusion, C. To inhibit growth of mandible in class-III malocclusion, D. To induce growth of mandible in class-III
B: To induce the growth of maxilla in skeletal retrusion
Answer: B: To induce the growth of maxilla in skeletal retrusion 
Explanation: Headgears that cause a forward pull. on maxilla are called reverse pull headgear. Facemask is one of the most common reverse pull headgears in use today.