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
Which is the most common complication during vaginal delivery in a diabetic women : 
Select and explain. 
A. Uterine ineia, B. Shoulder dystocia, C. Postpaum hemorrhage, D. Excessive moulding of head
B: Shoulder dystocia
Answer: B: Shoulder dystocia 
Explanation: Shoulder dystocia