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
Imaginary line joining MB1, Distal and Palatal orifices in maxillary 1st molar forms 
Select and explain. 
A. Maxillary triangle, B. Molar Triangle, C. Molar quadrilateral, D. None of the above
B: Molar Triangle
Answer: B: Molar Triangle 
Explanation: None