This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - III, Subject name: Gynaecology & Obstetrics
[{'content': 'Shoest skull diameter: \nSelect and explain. \nA. Biparietal, B. Mentoveical, C. Bitemporal, D. Bimastoid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Biparietal diameter - 9.5 cm - between the 2 parietal eminences Bitemporal diameter - 8.5 cm Bimastoid diameter - 7.5 cm - between the 2 mastoid processes', 'role': 'assistant'}]