This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Labour - II, Subject name: Gynaecology & Obstetrics
Vaginal delivery is contraindicted in :- 
Select and explain. 
A. Monochorionic monoamniotic twins, B. First twin veex 2nd breech, C. Extended breech, D. Mentoanterior position of head
A: Monochorionic monoamniotic twins
Answer: A: Monochorionic monoamniotic twins 
Explanation: Cesarean delivery is performed at 32 to 34 weeks as chances of cord entanglement are high in MCMA twins. Extended breech, first twin veex and second breech can be delivered vaginally Mentoanterior position (face presentation ) can be delivered vaginally by flexion (instead of extension)