Which fingerlike projections found in the dural venous sinuses reabsorb cerebrospinal fluid?

a. arachnoid villi

b. choroid plexuses

c. dural villi

d. lemnisci

e. microvilli?

The most correct answer for the above question is the Arachnoid villi. They are tufts of arachnoid membrane invaginated into the dural sinuses through which cerebrospinal fluid enters the venous system. They act as one way valves and they normally penetrate the overlying dura and invaginate through the walls of the superior sagittal sinuses and other venous structures.