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': 'Sonographic scan shows: \nSelect and explain. \nA. Single fetus, B. Snow storm appearance, C. Twins, D. Triplets', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Twins.Color Doppler Scan (TVS) showing twin pregnancy. Thick inter-twin membrane (twin peak sign) of Dichorionic diamniotic placenta is seen.', 'role': 'assistant'}]