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': 'All of the following are contra-indications for trial labour except: \nSelect and explain. \nA. Breech presentation, B. Outlet contraction, C. Primi gravida, D. Post cesarean pregnancy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Primi gravida', 'role': 'assistant'}]