This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - III, Subject name: Gynaecology & Obstetrics
Shoest skull diameter: 
Select and explain. 
A. Biparietal, B. Mentoveical, C. Bitemporal, D. Bimastoid
D: Bimastoid
Answer: D: Bimastoid 
Explanation: Biparietal diameter - 9.5 cm - between the 2 parietal eminences Bitemporal diameter - 8.5 cm Bimastoid diameter - 7.5 cm - between the 2 mastoid processes