This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetal Skull and Maternal Pelvis, Subject name: Gynaecology & Obstetrics
Maximum fetal skull diameter is: 
Select and explain. 
A. Biparietal diameter, B. Mentovertical, C. Occipitobregmatic, D. Occipitofrontal
B: Mentovertical
Answer: B: Mentovertical 
Explanation: Ans, B. MentoverticalRef: DC Dutta. Chapter fetal skull and maternal pelvis, p85ExplanationAll diameters are as follows:A. Suboccipito-bregmatic 9.5 cmB. Suboccipito-frontal 10 cmC. Occipitofrontal 11.5 cmD. Mentovertical 14 cmE. Submentovertical 11.5 cmF. Submentobregmatic 9.5 cm