Ductus venosus is connection between left umbilical vein

Anatomy doubt
Ductus venosus is connection between left umbilical vein and
a. Left hepatocardiac channel (cranial part of ivc)
b. Left portal vein.

How can option b be true - a connection between left portal vein and left portal vein !

Sorry my bad… I meant to ask it’s a connection between left umbilical vein and ……?