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
Cervical cross section of maxillary first premolar has: 
Select and explain. 
A. A round shape, B. Elliptical shape, C. Oval shape, D. Square shape
B: Elliptical shape
Answer: B: Elliptical shape 
Explanation: None