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
Commonest twin presentation is : 
Select and explain. 
A. Veex-brow, B. Veex-face, C. Veex-breech, D. Veex-veex
D: Veex-veex
Answer: D: Veex-veex 
Explanation: Veex-veex