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
The widest transverse diameter of the fetal skull is 
Select and explain. 
A. Biparietal diameter, B. Occipito-frontal diameter, C. Bitemporal diameter, D. Suboccipito-frontal diameter
A: Biparietal diameter
Answer: A: Biparietal diameter 
Explanation: Transverse diameters of fetal skull are

Biparietal diameter: 9.5cm
Super-subparietal: 8.5cm
Bitemporal: 8cm
Bimastoid: 7.5cm