This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Umbilical cord has – 
Select and explain. 
A. 1 vein and 2 arteries, B. 2 vein and 2 arteries, C. 1 vein and 1 artery, D. 2 veins and 1 artery
A: 1 vein and 2 arteries
Answer: A: 1 vein and 2 arteries 
Explanation: None