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
The average "Leeway space" available in each half of the
maxilla is approximately 
Select and explain. 
A. 0.9 mm, B. 2.9 mm, C. 4.0 mm, D. 6.9 mm
A: 0.9 mm
Answer: A: 0.9 mm 
Explanation: None