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
True regarding umblilical cord is(2018) 
Select and explain. 
A. 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
C: C) Observations of a single umblilical vein is associated with additional anomalies
Answer: C: C) Observations of a single umblilical vein is associated with additional anomalies 
Explanation: 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