Which of the following represents the embryological origin of Meckel's diveiculum?

Meckel's diveiculum results from failure or incomplete obliteration of Vitello intestinal duct( omphalomesentric duct). It follows the rule of '2' : 2% prevalence, 2:1 female predominance, located 2 feet proximal to the ileocecal valve in adults, 50% of symptomatic individuals are less than 2 years. Reference: Schwatz's Principles of Surgery 9e chapter 28.