Which structures in the diagram above connects the umbilical vein with the vena cava and connects the pulmonary artery with the aorta?

a, the ductus arteriosus; d the ductus venosus
b, the ductus arteriosus; d the ductus venosus
b, the ductus venosus; d the ductus arteriosus
a, the ductus venosus; d the ductus arteriosus

Option). B the ductus venosus; D the ductus arteriosus

Explanation:

In fetal circulation, the structure that connects the umbilical vein with the vena cava is known as ductus venosus. It allows transfer of oxygenated blood to bypass the fetal liver from the placenta. In given diagram, it is represented by letter B.

The structure that connects the pulmonary artery with aorta is known as ductus arteriosus. It allows flow of blood to the aorta from pulmonary artery, which is then transported to placenta for oxygenation.  In given diagram, it is represented by letter D.

what's the rest of the question

explanation: