Meckel's diveiculum is a remnant of ?

Ans. is 'd' i.e., Vitellointestinal duct Meckel's diveiculum Meckel's diveiculum is the persistent proximal pa of the vitellointestinal duct which normally disappears during intrauterine life. It follows 'rule of 2' :- present in 2% subjects, 2 inches (5 cm) long and is situated 2 feet (60 cm) proximal to ileocoecal valve. It is attached to antimesenteric border of ileum. Its calibre is equal to that of the ileum. Its apex may be free or attached to umblicus or mesentery by a fibrous band. o Vitellointestinal duct posseses all three coats of intestinal wall.