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
Transverse line extending from or between the middle of upper canine and incisive fossa is called: 
Select and explain. 
A. Horizontal line, B. Orientation line, C. Transverse line, D. CPC line
D: CPC line
Answer: D: CPC line 
Explanation: None