This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Congenital malformations, Subject name: Gynaecology & Obstetrics
[{'content': 'Recurrent aboion occurs in a woman, USG abdomen shows a non-echoic region in the central pa of the uterus. What is the probable diagnosis \nSelect and explain. \nA. Arcuate uterus, B. Septate uterus, C. Bicornuate uterus, D. Unicornuate uterus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Septate uterus is most common It causes about 25% of spontaneous first trimester aboions 6% second trimester aboions Ref: Shaw Gynecology 17 e pg 72.', 'role': 'assistant'}]