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
Where is the height of contour located relative to the following teeth (viewed from the mesial)? 
Select and explain. 
A. Facial surfaces of all molars, middle third., B. Lingual surfaces of all premolars and molars, cervical third., C. Lingual surfaces of molars and premolars, cervical or middle third., D. Anterior teeth, cervical or middle third.
C: Lingual surfaces of molars and premolars, cervical or middle third.
Answer: C: Lingual surfaces of molars and premolars, cervical or middle third. 
Explanation: Height of contour on lingual surfaces of molars and premolars is at the cervical or middle third.