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
S.N.A. angle describes the relationship of the: 
Select and explain. 
A. Maxilla to the cranial base, B. Mandible to the cranial base, C. Maxilla to mandible, D. Maxilla to the upper incisors
A: Maxilla to the cranial base
Answer: A: Maxilla to the cranial base 
Explanation: None