This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological Anatomy, Subject name: Gynaecology & Obstetrics
[{'content': 'Shortest sacrocotyloid diameter causing narrowing of pelvis is a feature of which type of maternal pelvis? \nSelect and explain. \nA. Android, B. Gynaecoid, C. Platypelloid, D. Anthrapoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c (Platypelloid) (Ref. Dutta Obstetrics 6th ed., p 90)SACROCOTYLOID DIAMETER (9.5 cm)# It is the distance between the mid point of the sacral promontory to iliopubic eminence.# It represents the space occupied by the biparietal dimeter of the head while negotiating the brim of flat pelvis.# Flat pelvis (transversely ovalI Platypelloid pelvis) is characterized by shortest sacrocotyloid diameter causing narrowing of pelvis from side to side.', 'role': 'assistant'}]