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
Functional appliances in skeletal class II are indicated when: 
Select and explain. 
A. Maxilla is normal, mandible is retrognathic, B. Maxilla is prognathic, C. Mandible is retrognathic in a mature individual, D. When severe crowding is present
A: Maxilla is normal, mandible is retrognathic
Answer: A: Maxilla is normal, mandible is retrognathic 
Explanation: Moderate to severe skeletal class-II malocclusion division 1 cases due to a short or retrognathic mandible are ideally suited for functional appliance treatment.
Class II division 2 type of malocclusions may be treated with functional appliances after correcting the axial inclinations of maxillary anteriors.