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
Distance between maxillary major connector and tooth tissue junction is 
Select and explain. 
A. 2 mm, B. 4 mm, C. 6 mm, D. 8 mm
C: 6 mm
Answer: C: 6 mm 
Explanation: None