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 of the following statement regarding umbilical cord is TRUE? 
Select and explain. 
A. Two aeries, B. Umbilical 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: Umbilical cord at term normally has two aeries and veins. At bih mature umbilical cord is approximately 50-60 cm in length and 12 mm in diameter. Single umbilical aery is seen in women with:DiabetesEpilepsy PreeclampsiaAntepaum hemorrhageOligohydramnios or hydramnios ANDChromosomal abnormalities Ref: Cunningham F.G., Leveno K.J., Bloom S.L., Hauth J.C., Rouse D.J., Spong C.Y. (2010). Chapter 3. Implantation, Embryogenesis, and Placental Development.