This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
Meckels diverticulum represents which structure of the embryonic life? 
Select and explain. 
A. Vitellointestinal duct, B. Wolfian duct, C. Mullerian duct, D. Paramesonophric gut
A: Vitellointestinal duct
Answer: A: Vitellointestinal duct 
Explanation: Ans. is 'a' i.e., Vitellointestinal duct * Meckel's diverticulum is present in 2% of the population; it is situated on the anti-mesenteric border of the small intestine, commonly 60cm from the ileocaecal valve, and is usually 3-5 cm long. Many variations occur (2% - 2 feet - 2 inches is a useful aide-memoire). It represents the patent intestinal end of the vitellointestinal duct.