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
An imaginary occlusal curve that contacts the buccal and lingual cusp tips of mandibular buccal teeth is called the 
Select and explain. 
A. Catenary curve, B. Curve of spee, C. Monson curve, D. Wilson curve
D: Wilson curve
Answer: D: Wilson curve 
Explanation: None