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
Length of C.P.I.T.N. probe is 
Select and explain. 
A. 14.0 mm, B. 13.0 mm, C. 11.5 mm, D. 12.5 mm
C: 11.5 mm
Answer: C: 11.5 mm 
Explanation: None