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
Shape of 1st Maxillary molar 
Select and explain. 
A. Rhomboid, B. Rounded triangular, C. Trapezoid, D. Square
A: Rhomboid
Answer: A: Rhomboid 
Explanation: None