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
[{'content': 'Umbilical cord has - \nSelect and explain. \nA. 1 vein and 2 aeries, B. 2 vein and 2 aeries, C. 1 vein and 1 aery, D. 2 veins and 1 aery', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1 Vein and 2 aeries", 'role': 'assistant'}]