Of what is the normal umbilical cord comprised?

1 artery carrying blood to the fetus and 1 vein carrying blood away from the fetus.

2 arteries carrying blood to the fetus and 2 veins carrying blood away from the fetus.

2 arteries carrying blood away from the fetus and 1 vein carrying blood to the fetus.

1 artery carrying blood to the fetus and 2 veins carrying blood away from the fetus.