This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Multiple Pregnancy, Subject name: Gynaecology & Obstetrics
[{'content': 'The main complication associated with multiple pregnancy: \nSelect and explain. \nA. PPH, B. Twin interlocking, C. Foetus papyraceous, D. Eclampsia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. PPHPPH is the real danger in twins due to:a. Atony of uterine muscles due to overdistension of uterus.b. Longer time taken by big placenta to separate.c. Bigger surface area of the placenta exposing more uterine sinuses.d. Implantation of a part of placenta in lower segment which is less retractile.', 'role': 'assistant'}]