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: Unknown
Shape of nulliparous cervix is: 
Select and explain. 
A. Transverse, B. Longitudinal, C. Circular, D. T shaped
C: Circular
Answer: C: Circular 
Explanation: Shape of nulliparous cervix is circular the cervix is spindle shaped and measures 2.5 cm. It is bounded above by internal os  and below by external os. In nulliparous women the external os is circular whereas parous cervix is characterized by a  transverse slit.