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': 'In an after coming head the following bone is perforated during decapitation : \nSelect and explain. \nA. Occiput, B. Parietal, C. Palate, D. Frontal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Occiput', 'role': 'assistant'}]