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 breech, engagement takes places earliest in : \nSelect and explain. \nA. Frank, B. Complete, C. Knee, D. Footing', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Frank', 'role': 'assistant'}]