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: Gynaecology & Obstetrics
True about isthmus are all except : 
Select and explain. 
A. Measures 20 mm in length, B. Forms lower uterine segment, C. Mucosa similar to endometrium, D. Present between cervical mucosa and endometrial mucosa
A: Measures 20 mm in length
Answer: A: Measures 20 mm in length 
Explanation: Measures 20 mm in length