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
In Steiner's analysis, SNA demonstrates: 
Select and explain. 
A. 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
B: Position of maxilla in relation to cranial base
Answer: B: Position of maxilla in relation to cranial base 
Explanation: Relating the Maxilla to the Skull: The angle SNA is formed by joining the lines S-N and N-A . The mean reading for this angle is 82°.
Steiners analysis demonstrates the position of maxilla and mandible in relation to the cranial base. 
If the angular reading is more than 82°, it would indicate a relative forward positioning or protrusion of the maxilla. Conversely, should the reading be less than 82°, it would indicate a relative backward or recessive location of the maxilla.