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: Gynaecology & Obstetrics
Ligamentum terea is formed after ': 
Select and explain. 
A. Obliteration of the umbilical vein, B. Obliteration of the ductus venous, C. Obliteration of the ductus aeriosus, D. Obliteration of the hypogastric aery
A: Obliteration of the umbilical vein
Answer: A: Obliteration of the umbilical vein 
Explanation: Obliteration of the umbilical vein