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
Suboccipitofrontal diameter is : 
Select and explain. 
A. 9.4 cm, B. 10 cm, C. 11.3 cm, D. 12 cm
B: 10 cm
Answer: B: 10 cm 
Explanation: 10 cm