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
Shoest diameter of the pelvic outlet is : 
Select and explain. 
A. Interspinous diameter, B. Antero posterior diameter, C. Posterior sagittal diameter, D. None of the above
C: Posterior sagittal diameter
Answer: C: Posterior sagittal diameter 
Explanation: Posterior sagittal diameter