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
Bitemporal diameter of fetus is: 
Select and explain. 
A. 10.5, B. 8, C. 11 5, D. 9.5
B: 8
Answer: B: 8 
Explanation: 8