This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'content': 'True regarding umblilical cord is(2018) \nSelect and explain. \nA. A) Two aery and two veins, B. B) One aery and two veins, C. C) Observations of a single umblilical vein is associated with additional anomalies, D. D) Observations of a single umblical aery is associated with additional anomalies', 'role': 'user'}, {'content': "Answer: C \nExplanation: Umbilical cord contains right and left umbilical aeries, the left umbilical vein, (LEFT IS LEFT), remnants of the vitello-intestinal duct and yolk sac. The ground substance of the umbilical cord is made up of Whaon's jelly derived from mesoderm. Ref:- Inderbirsingh, pg num:-46", 'role': 'assistant'}]