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': "In Steiner's analysis, SNA demonstrates: \nSelect and explain. \nA. Position of mandible in relation to cranial base, B. Position of maxilla in relation to cranial base, C. Maxillo-mandibular relationship, D. None of the above", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Relating the Maxilla to the Skull: The angle SNA is formed by joining the lines S-N and N-A . The mean\xa0reading for this angle is 82°.\nSteiners analysis demonstrates the position of maxilla and mandible in relation to the cranial base.\xa0\nIf the angular reading is more than 82°, it would indicate a relative forward positioning or protrusion\xa0of the maxilla. Conversely, should the reading be less than 82°, it would indicate a relative backward or recessive location of the maxilla.', 'role': 'assistant'}]