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: Anatomy
Length of Female adult cervical canal is - 
Select and explain. 
A. 2 cms, B. 2.5 cms, C. 6 cms, D. 10 cms
B: 2.5 cms
Answer: B: 2.5 cms 
Explanation: None