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
[{'content': 'AP diameter is more than transverse diameter in the following: \nSelect and explain. \nA. Anthropoid pelvis, B. Android pelvis, C. Platypelloid pelvis, D. Gynecoid pelvis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: A (Anthropoid pelvis) Ref: Dutta Textbook of Obstetrics pg 346Explanation:Traditional obstetrics characterizes four types of pelvises:Gyneceid: Ideal shape, with round to slightly oval (obstetrical inlet slightly less transverse) inlet: best chances for normal vaginal delivery.Android: Triangular inlet, and prominent ischial spines, more angulated pubic arch.Anthropoid: The widest transverse diameter is less than the anteroposterior (obstetrical) diameter.Platypelloid: Flat inlet with shortened obstetrical diameter. (See the following table)', 'role': 'assistant'}]