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
Maxillary protraction head gear is used for 
Select and explain. 
A. Max. skeletal protrusion, B. Mandibular skeletal retrusion, C. Bimaxillary protrusion, D. Skeletal open bite
A: Max. skeletal protrusion
Answer: A: Max. skeletal protrusion 
Explanation: None