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': "Zavenelli's manoeuver done in: \nSelect and explain. \nA. Shoulder dystocia, B. Deep transverse arrest, C. Retained placenta, D. Face presentation", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Manoeuvres done in case of:', 'role': 'assistant'}]