This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: ULTRASOUND, Subject name: Radiology
[{'content': 'T-sign is seen in \nSelect and explain. \nA. Diamniotic Monochorionic, B. Dichorionic Diamniotic, C. Monochorionic monoamniotic, D. Dichorionic Monoamniotic', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The "T sign" and Twin-peak sign(or lambda (l)sign) and is used in ultrasound assessment of multifetal pregnancy. T sign refers to the thin intervening septa denoting a Monochorionic pregnancy. Twin peak sign/Lambda sign denotes Dichorionic Diamniotic Twin Gestation', 'role': 'assistant'}]