<prompt> Vein of Galen drains into -Internal Juglar veinExternal Juglar veinStraight sinusSuperior sagittal sinus  <response>: Ans. is c i.e., Straight sinuso Great cerebral vein of Galen is formed by union of two internal cerebral veins,o It drains into straight sinus.o Is 2 cm long.o Its tributeries are internal cerebral vein, basal vein, occipital vein and posterior callosal vein. 