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
Largest Faciolingual dimension is seen in 
Select and explain. 
A. Lower 1st molar, B. Upper 1st molar, C. Lower 2nd molar, D. Upper 2nd molar
B: Upper 1st molar
Answer: B: Upper 1st molar 
Explanation: None