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
[{'content': 'Longest antero posterior diameter of the inlet is seen in pelvis : \nSelect and explain. \nA. Anthropoid, B. Platypelloid, C. Android, D. Gynaecoid', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Anthropoid', 'role': 'assistant'}]