This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - II, Subject name: Gynaecology & Obstetrics
What is normal bispinous diameter of pelvis 
Select and explain. 
A. 11.5 cm, B. 12.5 cm, C. 9.5 cm, D. 10.5 cm
D: 10.5 cm
Answer: D: 10.5 cm 
Explanation: Normal Bispinous/Interspinous diameter - 10.5 cm