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
ANB angle refers to 
Select and explain. 
A. Skeletal relation, B. Transverse discrepancy, C. Dental malocclusion, D. None of above
A: Skeletal relation
Answer: A: Skeletal relation 
Explanation: None