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
Which is true regarding umbilical cord: 
Select and explain. 
A. Two aeries, B. Umblical cord pulsation rate corresponds to maternal pulsation rate, C. Covered by amnion and chorion, D. Two veins
A: Two aeries
Answer: A: Two aeries 
Explanation: Two aeries