This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small and Large intestine, Subject name: Anatomy
[{'content': "Meckel's diveiculum is a derivative of \nSelect and explain. \nA. Allantoic diveiculum, B. Omphalo-mesenteric duct, C. Ventral mesogastrium, D. Ductus aeriosus", 'role': 'user'}, {'content': "Answer: B \nExplanation: Meckel's diveiculum: Midgut diveiculum attaching to developing gut tube is called vitelline duct / vitello-intestinal duct. It is also known as omphalomesenteric tube (antimesenteric towards ant abdominal wall) Normally, it is content of umbilical cord & it is obliterated If it is not obliterated, it results is an anomaly called Meckel's diveiculum There is an hindgut diveiculum called allantois which is also a content of umbilical cord. If allantois is not obliterated, it results in urachal fistula (where urine comes out of umbilicus) If fecal matter / meconium is at umbilicus of baby then it is Meckel's anomaly.", 'role': 'assistant'}]