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
Shoest skull diameter: March 2013 
Select and explain. 
A. Biparietal, B. Mentoveical, C. Bitemporal, D. Bimastoid
D: Bimastoid
Answer: D: Bimastoid 
Explanation: Ans. D i.e. Bimastoid Fetal skull Shoest diameter of fetal skull: Bimastoid (7.5 cm) Largest diameter of fetal skull: Mentoveical (14 cm)