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 following is true of Naegele's pelvis : 
Select and explain. 
A. Absence of one Ala, B. Both alae absent, C. Kyphotic spine, D. Triradiate pelvis
A: Absence of one Ala
Answer: A: Absence of one Ala 
Explanation: Absence of one Ala