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
Maxillary 1st molar has MB2 in: 
Select and explain. 
A. 41% of cases, B. 84% of cases, C. 60% of cases, D. 30% of cases
B: 84% of cases
Answer: B: 84% of cases 
Explanation: None