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
In Mandibular 1st molar smallest cusp is 
Select and explain. 
A. Distobuccal, B. Distal, C. Mesiobuccal, D. Mesial
B: Distal
Answer: B: Distal 
Explanation: None