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': 'What is the incidence rate of breech presentation at term? \nSelect and explain. \nA. 1, B. 3, C. 7, D. 10', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Breech is the commonest malpresentation. Incidence: 1 in 5 at 28th week, 5% at 34th week, 3% at term. Most common cause: prematurity Commonest position : laft sacro anterior Head is born by flexion Flexed breech is more common in multipara and extended breech is more common in primigravida Most common type of breech is extended.', 'role': 'assistant'}]