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': 'Classical cesarean section in indicated in a patient with : \nSelect and explain. \nA. Previous cesarean section, B. Placenta pre, C. Carcinoma cervix, D. Shoulder presentation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Carcinoma cervix', 'role': 'assistant'}]