<prompt> All are true about peritoneal folds exceptMedian umbilical fold is obliterated to become urachus in adultsMedial umbilical fold is peritoneal fold on medial umbilical ligamentMedial umbilical fold covers allantoisLateral umbilical fold produced by inferior epigastric vessels  <response>: Urachus fistula is a remnant of allantoic diveiculum. It is a diveiculum of hind gut and connects umbilicus to urinary bladder. The lumen of allantoic duct-is obliterated at the time of bih. Median Umblical Ligament is the remanant of urachus. It covers allantois. Urine keeps on dribbling in urachal fistula Figure showing Urachal fistula 