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: Anatomy
Left Umbilical vein becomes: 
Select and explain. 
A. Ligamentum teres, B. Ligamentum venosum, C. Medial umbilical ligament, D. Ligamentum aeriosum
A: Ligamentum teres
Answer: A: Ligamentum teres 
Explanation: Ligamentum teres