This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pediatrics
Umbilical cord has ____________ 
Select and explain. 
A. 1 vein and 2 aeries, B. 2 vein and 2 aeries, C. 1 vein and 1 aery, D. 2 veins and 1 aery
A: 1 vein and 2 aeries
Answer: A: 1 vein and 2 aeries 
Explanation: Umbilical cord contain two aeries & one vein. Ref : Ghai essential of pediatrics, 19th edition, p.no402 ; Davidson principal and practice of internal medicine, 22nd edition, p.no:630