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
Hapsburg jaw refers to: 
Select and explain. 
A. Class 3 malocclusion, B. Class 2 malocclusion, C. Posterior cross bite., D. Anterior cross bite
A: Class 3 malocclusion
Answer: A: Class 3 malocclusion 
Explanation: None