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
A distinguishing characteristic of a maxillary first premolar that identifies it as right or left is the: 
Select and explain. 
A. Height of the lingual cusp, B. Mesial inclination of the lingual cusp, C. Flattened area beneath the contact on the distal surface, D. Greater length of the mesial cusp ridge on the Lingual cusp
B: Mesial inclination of the lingual cusp
Answer: B: Mesial inclination of the lingual cusp 
Explanation: None