This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
What are the vessels in umbilical cord? 
Select and explain. 
A. 1 artery, 2 veins, B. 2 arteries, 1 vein, C. 1 artery, 1 vein, D. 2 arteries, 2 veins
B: 2 arteries, 1 vein
Answer: B: 2 arteries, 1 vein 
Explanation: Ans. B 2 arteries, 1 veinRef: I.B. Singh, 9th ed. pg. 59"Remember 2AV"* Umbilical cord is the structure which connects mother to fetus and acts as a bridge for transfer of blood and other nutrients from mother to baby.* It contains 2 arteries and one vein. Arteries carry deoxygenated blood from fetus to mother while vein carries oxygenated blood from mother towards fetus.* Cord contains Wharton's jelly and the structures embedded in this are:# 2 arteries and 1 vein# Allantois and# Remains of Vitello intestinal duct