This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Anatomy
The shoest diameter of fetal head : 
Select and explain. 
A. Biparietal diameter, B. Suboccipitofrontal diameter, C. Occipitofrontal diameter, D. Bitemporal diameter
D: Bitemporal diameter
Answer: D: Bitemporal diameter 
Explanation: Bitemporal and biparietal diameters are transverse diameters whereas suboccipitofrontal and occipitofrontal are the anteroposterior diameters Bitemporal diameter is 8 cm Ref: Datta Obs 9e pg 77.