The question is incomplete as it does not have the option which are:
Answer:
Inferior vena cava
Explanation:
The circulatory system of human contains blood vessels to transport the blood to and from the heart. The veins transport the deoxygenated blood from the body to the heart and the arteries transport the oxygenated blood from the heart to the body.
Inferior vena cava is the large sized vein which transports the deoxygenated blood. The inferior cava is of two types: superior and inferior.
The inferior vena cava brings the deoxygenated blood from the lower body to the heart therefore the hepatic portal vein drain the blood into the inferior vena cava.
Thus, Inferior vena cava is correct.