Explanation Correct Answer:- D.a. Umbilical fistula; b. Umbilical sinus; c. Meckel’s diverticulum
• Omphalomesenteric (vitello-intestinal) duct is an embryonic structure which connects the yolk sac to the midgut.
• It gets obliterated between the 5th and 9th week of gestation, failure of which result in remnants like Meckel’s diverticulum/cyst/
• Median umbilical fold is a peritoneal fold raised by allantoic remnant called urachus.
• Omphalocele occurs due to non-regression of the physiological umbilical hernia.