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 cusp is 
Select and explain. 
A. Mesiolingual cusp of upper 1st molar, B. Mesiolingual cusp of Upper 2nd molar, C. Buccolingual cusp of Upper 1st molar, D. Buccolingual cusp of lower 2nd molar
A: Mesiolingual cusp of upper 1st molar
Answer: A: Mesiolingual cusp of upper 1st molar 
Explanation: None