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
[{'content': 'S.N.A. angle describes the relationship of the: \nSelect and explain. \nA. Maxilla to the cranial base, B. Mandible to the cranial base, C. Maxilla to mandible, D. Maxilla to the upper incisors', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]