<prompt> Great cerebral vein of Galen drains into -Cavernous sinusBasal veinInternal cerebral veinStraight sinus  <response>: Ans. is d i.e., Straight sinuso Great cerebral vein of Galen is formed by the union of two internal cerebral veins.o It is 2 cm long.o It is drains into the straight sinus.o Its tributaries arei Internal cerebral veinsii Basal veinsiii Occipital veinsiv Posterior callosal vein 