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
Largest diameter of pelvic cavity: March 2013 
Select and explain. 
A. Anteroposterior, B. Oblique, C. Transverse, D. All are same
D: All are same
Answer: D: All are same 
Explanation: Ans. D i.e. All are same Maternal pelvis MC type: Gynaecoid Platypelloid/ flat pelvis: Transverse diameter is more than AP diameter Least common type of pelvis: Platypelloid Deep transverse arrest/ persistent occipito posterior position is common in: Android pelvis AP diameter more than transverse diameter: Anthropoid pelvis Face to pubis delivery is common in: Anthropoid pelvis Shoest diameter of pelvic inlet: Obstetric conjugate