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
Zavenelli's manoeuver done in: 
Select and explain. 
A. Shoulder dystocia, B. Deep transverse arrest, C. Retained placenta, D. Face presentation
A: Shoulder dystocia
Answer: A: Shoulder dystocia 
Explanation: Manoeuvres done in case of: