Uterine and vaginal veins drains into which of the following veins ?

Venous Drainage - The veins form a plexus along the lateral border of the uterus. The plexus drains through the uterine, ovarian and vaginal veins into the internal iliac veins. Ref : B D Chaurasia's Human Anatomy , seventh edition,volume 2, pg.no., 422.