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
Bi-zygomatic width divided by 16 gives approximate mesiodistal width of 
Select and explain. 
A. Upper central incisor, B. Lower central incisor, C. Upper anterior teeth, D. Lower anterior teeth
A: Upper central incisor
Answer: A: Upper central incisor 
Explanation: None