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
According to American Board of Orthodontics recommendation for colour coding of sequential tracing, end treatment ceph tracing is done in: 
Select and explain. 
A. Black, B. Blue, C. Red, D. Green
C: Red
Answer: C: Red 
Explanation: None