This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology, Subject name: Anatomy
Ligamentum Teres develops from- 
Select and explain. 
A. Ductus Venisus, B. Umbilical artery, C. Umbilical Vein, D. Septim Primum
C: Umbilical Vein
Answer: C: Umbilical Vein 
Explanation: Ans. is 'c' i.e., Umbilical Vein Embryonic partRemnantsDuctus arteriosusLigamentum arteriosumUmbilical arteryProximal part: - Superior vesical artery.Distal part: - Medial umbilical ligamentUmbilical vein (left)Ligamentum teresDuctus venosusLigamentum venosusSeptum primumFloor of fossa ovalisSeptum secondumAnnulus ovalis / Limbus fossa ovalis