In fetal circulation, the ductus venosus connects which structures to allow oxygenated blood from placenta to bypass the liver?

Correct option is A

Ductus venosus shunts oxygenated blood from the umbilical vein to the IVC, bypassing hepatic circulation and ensuring oxygen-rich blood reaches the heart/brain.
Explanation of options: (a) ✔ Correct; ductus venosus links umbilical vein → IVC. (b) ✘ Umbilical artery carries deoxygenated blood to placenta, not portal vein. (c) ✘ Portal vein drains GI tract blood, not directly connected to right atrium. (d) ✘ Umbilical vein never connects to SVC.